Sat Mar 6 03:18:38 2021
EVENTS
 FREE
SOFTWARE
INSTITUTE

POLITICS
JOBS
MEMBERS'
CORNER

MAILING
LIST

NYLXS Mailing Lists and Archives
NYLXS Members have a lot to say and share but we don't keep many secrets. Join the Hangout Mailing List and say your peice.

DATE 2015-02-01

LEARN

2021-03-06 | 2021-02-06 | 2021-01-06 | 2020-12-06 | 2020-11-06 | 2020-10-06 | 2020-09-06 | 2020-08-06 | 2020-07-06 | 2020-06-06 | 2020-05-06 | 2020-04-06 | 2020-03-06 | 2020-02-06 | 2020-01-06 | 2019-12-06 | 2019-11-06 | 2019-10-06 | 2019-09-06 | 2019-08-06 | 2019-07-06 | 2019-06-06 | 2019-05-06 | 2019-04-06 | 2019-03-06 | 2019-02-06 | 2019-01-06 | 2018-12-06 | 2018-11-06 | 2018-10-06 | 2018-09-06 | 2018-08-06 | 2018-07-06 | 2018-06-06 | 2018-05-06 | 2018-04-06 | 2018-03-06 | 2018-02-06 | 2018-01-06 | 2017-12-06 | 2017-11-06 | 2017-10-06 | 2017-09-06 | 2017-08-06 | 2017-07-06 | 2017-06-06 | 2017-05-06 | 2017-04-06 | 2017-03-06 | 2017-02-06 | 2017-01-06 | 2016-12-06 | 2016-11-06 | 2016-10-06 | 2016-09-06 | 2016-08-06 | 2016-07-06 | 2016-06-06 | 2016-05-06 | 2016-04-06 | 2016-03-06 | 2016-02-06 | 2016-01-06 | 2015-12-06 | 2015-11-06 | 2015-10-06 | 2015-09-06 | 2015-08-06 | 2015-07-06 | 2015-06-06 | 2015-05-06 | 2015-04-06 | 2015-03-06 | 2015-02-06 | 2015-01-06 | 2014-12-06 | 2014-11-06 | 2014-10-06

Key: Value:

Key: Value:

MESSAGE
DATE 2015-02-26
FROM Ruben Safir
SUBJECT Subject: [LIU Comp Sci] [mrbrklyn@panix.com: (fwd) Re: Role of functional dependencies in
From owner-learn-outgoing-at-mrbrklyn.com Thu Feb 26 07:11:07 2015
Return-Path:
X-Original-To: archive-at-mrbrklyn.com
Delivered-To: archive-at-mrbrklyn.com
Received: by mrbrklyn.com (Postfix)
id 899B8161174; Thu, 26 Feb 2015 07:11:07 -0500 (EST)
Delivered-To: learn-outgoing-at-mrbrklyn.com
Received: by mrbrklyn.com (Postfix, from userid 28)
id 7A900161186; Thu, 26 Feb 2015 07:11:07 -0500 (EST)
Delivered-To: learn-at-nylxs.com
Received: from mailbackend.panix.com (mailbackend.panix.com [166.84.1.89])
by mrbrklyn.com (Postfix) with ESMTP id EE7A0161174
for ; Thu, 26 Feb 2015 07:11:06 -0500 (EST)
Received: from panix2.panix.com (panix2.panix.com [166.84.1.2])
by mailbackend.panix.com (Postfix) with ESMTP id CB925109B2
for ; Thu, 26 Feb 2015 07:11:06 -0500 (EST)
Received: by panix2.panix.com (Postfix, from userid 20529)
id BE30633C79; Thu, 26 Feb 2015 07:11:06 -0500 (EST)
Date: Thu, 26 Feb 2015 07:11:06 -0500
From: Ruben Safir
To: learn-at-nylxs.com
Subject: [LIU Comp Sci] [mrbrklyn-at-panix.com: (fwd) Re: Role of functional dependencies in
database design]
Message-ID: <20150226121106.GI7105-at-panix.com>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
User-Agent: Mutt/1.5.23 (2014-03-12)
Sender: owner-learn-at-mrbrklyn.com
Precedence: bulk
Reply-To: learn-at-mrbrklyn.com

----- Forwarded message from Ruben Safir -----

Date: Thu, 26 Feb 2015 07:08:28 -0500 (EST)
From: Ruben Safir
To: mrbrklyn-at-panix.com
Subject: (fwd) Re: Role of functional dependencies in database design
User-Agent: tin/2.2.1-20140504 ("Tober an Righ") (UNIX) (NetBSD/6.1.5 (i386))

-- forwarded message --
X-Received: by 10.50.29.6 with SMTP id f6mr4383098igh.2.1423767497936;
Thu, 12 Feb 2015 10:58:17 -0800 (PST)
X-Received: by 10.140.40.242 with SMTP id x105mr74619qgx.14.1423767497801;
Thu, 12 Feb 2015 10:58:17 -0800 (PST)
Path: reader1.panix.com!panix!usenet.stanford.edu!hl2no15102169igb.0!news-out.google.com!n6ni6qar.0!nntp.google.com!j7no145566qaq.1!postnews.google.com!glegroupsg2000goo.googlegroups.com!not-for-mail
Newsgroups: comp.databases.theory
Date: Thu, 12 Feb 2015 10:58:17 -0800 (PST)
In-Reply-To:
Complaints-To: groups-abuse-at-google.com
Injection-Info: glegroupsg2000goo.googlegroups.com; posting-host=213.219.142.118;
posting-account=-nQufgoAAABsreOCZNqo2Uyh8O-fYVPT
NNTP-Posting-Host: 213.219.142.118
References:
User-Agent: G2/1.0
MIME-Version: 1.0
Message-ID:
Subject: Re: Role of functional dependencies in database design
From: Erwin
Injection-Date: Thu, 12 Feb 2015 18:58:17 +0000
Content-Type: text/plain; charset=ISO-8859-1
Content-Transfer-Encoding: quoted-printable
Lines: 145
Xref: panix comp.databases.theory:75524

Op donderdag 12 februari 2015 17:02:19 UTC+1 schreef Nicola:
> I hope you won't mind if I start a new thread for the subject. The other=
=20
> thread has got quite long and somewhat off-topic.
>=20
> So, the question is: what is the role of FDs (and possibly other types=20
> of dependencies) in database design? My personal take:
>=20
> In general, I don't think that it is possible for them to inform the=20
> design activity since the early stages or that they should be used as=20
> the main design tool. I do think, however, that when a system is=20
> understood sufficiently well (e.g., by means of a conceptual design),=20
> they offer an aid (are my schemas well-designed according to certain=20
> criteria?) and insight (allowing us to possibly find alternative ways to=
=20
> design a database, for example).

The problem is that formally speaking, you must first have that conceptual =
design (entities+relships) translated into a logical one (relvars). Only a=
fter that can you start thinking about FDs and normalization, and it requir=
es that you somehow derived the FDs from, well what else other than the con=
ceptual schema you have, perhaps incremented with a pack of tacit understan=
dings of what it represents.

And what in a conceptual schema is it that you can get the FDs from ? NOT =
from any key specifications that are already there, because if you already =
have them, it's pointless deriving FDs from them only to find out that norm=
alization theory gives you exactly the keys you started off with.

The normalization procedure/process as rooted in normalization theory, assu=
mes a bottom-up methodology. First assume the database is a single giganti=
c table, then start decomposing. The trouble is that most people intuitive=
ly prefer top-down, in practice they also do it, and I have certainly known=
a time when they got things close to 99% right without any application of =
any kind of normalization theory.



>=20
> >> Nicola wrote:=20
> >> FDs do not come out of void, they follow from your requirements. They=
=20
> >> are just a formal version of a very special (and relatively simple)=20
> >> type=20
> >> of requirement. I don't arbitrarily decide to assume that {desert=20
> >> island} -> {can opener}, unless you tell me that there cannot be two=
=20
> >> can=20
> >> openers in the same desert island, in the world of desert islands you=
=20
> >> are interested in.
>=20
> > Erwin wrote:
> >There you have it. When people tell you "there can only be one can=20
> >opener on any given desert island", then what do you see ?
> >
> >A table {desert island, can opener} with (a.o.) a key "desert island",=
=20
> >or
> >A relation schema of whatever set of attributes in which you must add=20
> >the FD desert island -> can opener ? Where this then tells you "the=20
> >identity of a desert island is a determinant factor to the identity of=
=20
> >the can opener that is on it" or "the relation over {desert island, can=
=20
> >opener} is a function from desert island to can opener" ?
>=20
> At an early stage, you probably cannot say: it might also be that desert=
=20
> island and can opener should be represented as two relation schemas (for=
=20
> which we have identified no attributes yet) related through a one-one or=
=20
> one-many relationship. My point here is simply that FDs are not=20
> invented, they are discovered.

My question, and what I would like to understand is : what exactly is the a=
vailable input (its semantics and in which possible syntactic forms does it=
appear, and where) that allows this "discovery" to be made ? I think JKL'=
s post where he used the word "pesky" expressed the very same concern.



>=20
> >> FDs are a special type of first-order formulas. I can imagine >>=20
> defining=20
> >> an English-like syntax for them.
>=20
> (Not that it would necessarily be a good idea, I should add.)
>=20
> >Hmmmmmmmm.
> >
> >"The projection on {desert island, can opener} of the join of all=20
> >tables in the database, represents a function from desert island to can=
=20
> >opener."
>=20
> Well no, like this certainly no :) Maybe something along these lines=20
> (paraphrasing the given-when-then constructs existing in some testing=20
> tools):
>=20
> given two lecturers L1 and L2 and a time T
> when L1 is teaching at time T and L2 is teaching at time T
> then L1 and L2 are in different rooms

Well, there you have it. If you think that this sentence indicates an FD {=
L,T} -> {room}, then you are wrong ! This statement per se does not prohib=
it the same lecturer being in two distinct rooms at the same time. (Physic=
s does, perhaps, but that really is another issue. My issue is correct log=
ical inferences from given requirements as stated.)

The correct conclusion here is the FD {room,T} -> {L}. But before spotting=
that, I first had to twist the requirement into "only one lecturer can be =
in any given room at any time". Or "if two observations of a lecturer bein=
g in a room at time T, both involve the same room and the same time T, then=
they involve the same lecturer". But (knowing what the FD turned out to b=
e and looking back on the natural language formulation) I find those altern=
atives only slightly less convoluted than your original.

(Your example being "temporal" is very tempting to go drifting off into the=
temporal arena. In fact, the temporal proposals by Darwen/Date/Lorentzos =
talk about keys almost all the time, but normalization theory isn't mention=
ed even once. My feeling is the current normalization theory is insufficie=
nt to underpin their approach soundly, and although I very much like their =
approach altogether, I'm amazed I never see any complaint about this.)

(...leaving the ASSERTIONs example for another post)



>=20
> (this is absolutely off the top of my head: don't take it as a serious=20
> attempt).
>=20
> >And besides, avoiding redundancy was only a relevant topic in database=
=20
> >design as long as there were no feasible ways to control the=20
> >redundancies, e.g. via ASSERTIONs. Those days are gone.
>=20
> Could you provide a small example?
>=20
> Nicola
>=20
> --- news://freenews.netfront.net/ - complaints: ---

-- end of forwarded message --

----- End forwarded message -----

  1. 2015-02-01 Ruben Safir <mrbrklyn-at-panix.com> Re: [LIU Comp Sci] DMA memory and CPU activity
  2. 2015-02-01 Ruben Safir <mrbrklyn-at-panix.com> Re: [LIU Comp Sci] DMA memory and CPU activity
  3. 2015-02-01 Ruben <ruben.safir-at-my.liu.edu> Subject: [LIU Comp Sci] DMA memory and CPU activity
  4. 2015-02-02 Ruben Safir <mrbrklyn-at-panix.com> Re: [LIU Comp Sci] DMA memory and CPU activity
  5. 2015-02-02 Ruben Safir <mrbrklyn-at-panix.com> Re: [LIU Comp Sci] Operating System History
  6. 2015-02-02 Ruben Safir <mrbrklyn-at-panix.com> Re: [LIU Comp Sci] Operating System History
  7. 2015-02-02 Ruben Safir <mrbrklyn-at-panix.com> Re: [LIU Comp Sci] study hall today
  8. 2015-02-02 Kamran <kamran.mirzayev-at-my.liu.edu> Re: [LIU Comp Sci] [announce-at-lists.isoc-ny.org: [isoc-ny] Two NYC
  9. 2015-02-02 Ruben Safir <mrbrklyn-at-panix.com> Subject: [LIU Comp Sci] blackboard notice
  10. 2015-02-02 Ruben Safir <mrbrklyn-at-panix.com> Subject: [LIU Comp Sci] Landing Jobs in the IT Field
  11. 2015-02-02 Ruben <ruben.safir-at-my.liu.edu> Subject: [LIU Comp Sci] Operating System History
  12. 2015-02-02 Ruben <ruben.safir-at-my.liu.edu> Subject: [LIU Comp Sci] Operating Systems Quiz
  13. 2015-02-02 Ruben <ruben.safir-at-my.liu.edu> Subject: [LIU Comp Sci] Re: Operating System History
  14. 2015-02-02 Ruben <ruben.safir-at-my.liu.edu> Subject: [LIU Comp Sci] Re: Operating System History
  15. 2015-02-02 mrbrklyn-at-panix.com Subject: [LIU Comp Sci] [announce-at-lists.isoc-ny.org: [isoc-ny] Two NYC meetups Tuesday]
  16. 2015-02-03 Ruben <mrbrklyn-at-panix.com> Re: [LIU Comp Sci] [announce-at-lists.isoc-ny.org: [isoc-ny] Two NYC
  17. 2015-02-04 Tony Genao <tony.genao-at-my.liu.edu> Re: [LIU Comp Sci] Compus Meeting
  18. 2015-02-04 Ruben Safir <mrbrklyn-at-panix.com> Re: [LIU Comp Sci] Compus Meeting
  19. 2015-02-04 Ruben Safir <mrbrklyn-at-panix.com> Re: [LIU Comp Sci] Compus Meeting
  20. 2015-02-04 Ruben Safir <mrbrklyn-at-panix.com> Re: [LIU Comp Sci] [announce-at-lists.isoc-ny.org: [isoc-ny] Two NYC
  21. 2015-02-04 Tony Genao <tony.genao-at-my.liu.edu> Re: [LIU Comp Sci] [announce-at-lists.isoc-ny.org: [isoc-ny] Two NYC
  22. 2015-02-04 Kamran <kamran.mirzayev-at-my.liu.edu> Re: [LIU Comp Sci] [announce-at-lists.isoc-ny.org: [isoc-ny] Two NYC
  23. 2015-02-04 Ruben Safir <mrbrklyn-at-panix.com> Re: [LIU Comp Sci] [announce-at-lists.isoc-ny.org: [isoc-ny] Two NYC
  24. 2015-02-04 Ruben Safir <mrbrklyn-at-panix.com> Subject: [LIU Comp Sci] (fwd) Operating System Design
  25. 2015-02-04 Ruben Safir <mrbrklyn-at-panix.com> Subject: [LIU Comp Sci] (fwd) Operating System Design
  26. 2015-02-04 Ruben Safir <mrbrklyn-at-panix.com> Subject: [LIU Comp Sci] (fwd) Operating System Design
  27. 2015-02-04 Ruben Safir <mrbrklyn-at-panix.com> Subject: [LIU Comp Sci] (fwd) Operating System Design
  28. 2015-02-04 Ruben Safir <mrbrklyn-at-panix.com> Subject: [LIU Comp Sci] (fwd) Operating System Design
  29. 2015-02-04 Ruben Safir <mrbrklyn-at-panix.com> Subject: [LIU Comp Sci] (fwd) Operating System Design
  30. 2015-02-04 Ruben Safir <mrbrklyn-at-panix.com> Subject: [LIU Comp Sci] (fwd) Operating System Design
  31. 2015-02-04 Ruben Safir <mrbrklyn-at-panix.com> Subject: [LIU Comp Sci] (fwd) Operating System Design
  32. 2015-02-04 Ruben Safir <mrbrklyn-at-panix.com> Subject: [LIU Comp Sci] (fwd) Re: Operating System Design
  33. 2015-02-04 Ruben Safir <mrbrklyn-at-panix.com> Subject: [LIU Comp Sci] (fwd) Re: Operating System Design
  34. 2015-02-04 Ruben Safir <mrbrklyn-at-panix.com> Subject: [LIU Comp Sci] (fwd) Re: Operating System Design
  35. 2015-02-04 Ruben Safir <mrbrklyn-at-panix.com> Subject: [LIU Comp Sci] (fwd) Re: Operating System Design
  36. 2015-02-04 Ruben Safir <mrbrklyn-at-panix.com> Subject: [LIU Comp Sci] (fwd) Re: Operating System Design
  37. 2015-02-04 Ruben Safir <mrbrklyn-at-panix.com> Subject: [LIU Comp Sci] (fwd) Re: Operating System Design
  38. 2015-02-04 Ruben Safir <mrbrklyn-at-panix.com> Subject: [LIU Comp Sci] algorithms pop tarts
  39. 2015-02-04 Ruben Safir <mrbrklyn-at-panix.com> Subject: [LIU Comp Sci] cgroups meeting
  40. 2015-02-04 Ruben Safir <mrbrklyn-at-panix.com> Subject: [LIU Comp Sci] Compus Meeting
  41. 2015-02-04 Ruben Safir <mrbrklyn-at-panix.com> Subject: [LIU Comp Sci] Essentail Database tools
  42. 2015-02-04 Ruben <ruben.safir-at-my.liu.edu> Subject: [LIU Comp Sci] tony
  43. 2015-02-04 mrbrklyn-at-panix.com Subject: [LIU Comp Sci] [info-at-fsf.org: Gorgeous animated video against DRM]
  44. 2015-02-05 Tony Genao <tony.genao-at-my.liu.edu> Re: [LIU Comp Sci] tony
  45. 2015-02-05 Ruben Safir <mrbrklyn-at-panix.com> Re: [LIU Comp Sci] tony
  46. 2015-02-05 Tony Genao <tony.genao-at-my.liu.edu> Re: [LIU Comp Sci] tony
  47. 2015-02-05 Ruben Safir <mrbrklyn-at-panix.com> Subject: [LIU Comp Sci] SOC assignment
  48. 2015-02-05 Ruben Safir <mrbrklyn-at-panix.com> Subject: [LIU Comp Sci] [NYLXS - HANGOUT] Very Good Jobs
  49. 2015-02-07 Ruben Safir <mrbrklyn-at-panix.com> Subject: [LIU Comp Sci] [mrbrklyn-at-panix.com: (fwd) Re: why not use naked delete ?]
  50. 2015-02-07 Ruben Safir <mrbrklyn-at-panix.com> Subject: [LIU Comp Sci] [mrbrklyn-at-panix.com: (fwd) Re: why not use naked delete ?]
  51. 2015-02-07 Ruben Safir <mrbrklyn-at-panix.com> Subject: [LIU Comp Sci] [mrbrklyn-at-panix.com: (fwd) Re: why not use naked delete ?]
  52. 2015-02-08 mrbrklyn-at-panix.com Subject: [LIU Comp Sci] Double Stacks
  53. 2015-02-08 mrbrklyn-at-panix.com Subject: [LIU Comp Sci] Double Stacks
  54. 2015-02-08 mrbrklyn-at-panix.com Subject: [LIU Comp Sci] [announce-at-lists.isoc-ny.org: =?utf-8?Q?=5B?=
  55. 2015-02-09 Ruben Safir <mrbrklyn-at-panix.com> Subject: [LIU Comp Sci] Fwd: Invitation: cgroups and cgroups v2
  56. 2015-02-09 Ruben Safir <mrbrklyn-at-panix.com> Subject: [LIU Comp Sci] OS Design
  57. 2015-02-10 Ruben <ruben.safir-at-my.liu.edu> Subject: [LIU Comp Sci] Fwd: operating systems design
  58. 2015-02-10 Ruben Safir <mrbrklyn-at-panix.com> Subject: [LIU Comp Sci] Student Computer Sciences Study Center
  59. 2015-02-10 mrbrklyn-at-panix.com Subject: [LIU Comp Sci] [info-at-meetup.com: Invitation: NYLUG Open hacker hours]
  60. 2015-02-10 mrbrklyn-at-panix.com Subject: [LIU Comp Sci] [info-at-meetup.com: Monday: Join 56 Rubyists at "Project Night"]
  61. 2015-02-11 Maneesh Kongara <maneeshkongara-at-gmail.com> Re: [LIU Comp Sci] Friday Morning Volunteer
  62. 2015-02-11 Ruben <ruben.safir-at-my.liu.edu> Re: [LIU Comp Sci] Friday Morning Volunteer
  63. 2015-02-11 Ruben Safir <mrbrklyn-at-panix.com> Re: [LIU Comp Sci] Re: [NYLXS - HANGOUT] Friday Morning Volunteer
  64. 2015-02-11 Ruben Safir <mrbrklyn-at-panix.com> Re: [LIU Comp Sci] tony
  65. 2015-02-11 Ruben Safir <mrbrklyn-at-panix.com> Subject: [LIU Comp Sci] Friday Morning Volunteer
  66. 2015-02-11 Ruben <ruben.safir-at-my.liu.edu> Subject: [LIU Comp Sci] Re: [NYLXS - HANGOUT] Friday Morning Volunteer
  67. 2015-02-11 Ruben <mrbrklyn-at-panix.com> Subject: [LIU Comp Sci] Re: [NYLXS - HANGOUT] Friday Morning Volunteer
  68. 2015-02-11 Ruben Safir <mrbrklyn-at-panix.com> Subject: [LIU Comp Sci] Towers of Hanio
  69. 2015-02-12 Ruben Safir <mrbrklyn-at-panix.com> Subject: [LIU Comp Sci] NEtworking Class
  70. 2015-02-12 Ruben <ruben.safir-at-my.liu.edu> Subject: [LIU Comp Sci] Re: Operating Systems (CS_643_001_BK_SPRG2015): Next Meeting Friday
  71. 2015-02-12 Ruben Safir <mrbrklyn-at-panix.com> Subject: [LIU Comp Sci] Re: [NYLXS - HANGOUT] Friday Morning Volunteer
  72. 2015-02-12 mrbrklyn-at-panix.com Subject: [LIU Comp Sci] [announce-at-lists.isoc-ny.org: =?utf-8?Q?=5B?=
  73. 2015-02-12 mrbrklyn-at-panix.com Subject: [LIU Comp Sci] [dmarti-at-zgp.org: [linux-elitists] No results found for "social
  74. 2015-02-13 Ruben Safir <mrbrklyn-at-panix.com> Subject: [LIU Comp Sci] Fwd: Re: Operating Systems (CS_643_001_BK_SPRG2015): Next Meeting
  75. 2015-02-15 Ruben Safir <mrbrklyn-at-panix.com> Re: [LIU Comp Sci] Friday Morning Volunteer
  76. 2015-02-15 Ruben Safir <mrbrklyn-at-panix.com> Subject: [LIU Comp Sci] Re: Journal Article
  77. 2015-02-16 Ruben Safir <mrbrklyn-at-panix.com> Subject: [LIU Comp Sci] Home Works
  78. 2015-02-17 Ruben Safir <mrbrklyn-at-panix.com> Subject: [LIU Comp Sci] OS Class Ctp 2 Dtrace
  79. 2015-02-18 Ruben Safir <mrbrklyn-at-panix.com> Subject: [LIU Comp Sci] Hwk4 Allorithms
  80. 2015-02-18 Ruben Safir <mrbrklyn-at-panix.com> Subject: [LIU Comp Sci] Recursive Allorithms
  81. 2015-02-19 From: "keisha.sylvester" <keisha.sylvester-at-my.liu.edu> RE: [LIU Comp Sci] Hwk4 Allorithms
  82. 2015-02-19 Ruben Safir <mrbrklyn-at-panix.com> Re: [LIU Comp Sci] Hwk4 Allorithms
  83. 2015-02-19 Ruben Safir <mrbrklyn-at-panix.com> Subject: [LIU Comp Sci] Midterm Exams Samples
  84. 2015-02-20 Ruben Safir <mrbrklyn-at-panix.com> Subject: [LIU Comp Sci] a little C++ insite
  85. 2015-02-22 Ruben <ruben.safir-at-my.liu.edu> Re: [LIU Comp Sci] Binary tree Excersize
  86. 2015-02-22 Ruben <ruben.safir-at-my.liu.edu> Re: [LIU Comp Sci] Binary tree Excersize
  87. 2015-02-22 Ruben Safir <mrbrklyn-at-panix.com> Re: [LIU Comp Sci] Binary tree Excersize
  88. 2015-02-22 Ruben Safir <mrbrklyn-at-panix.com> Subject: [LIU Comp Sci] Binary tree Excersize
  89. 2015-02-23 From: "keisha.sylvester" <keisha.sylvester-at-my.liu.edu> RE: Re: [LIU Comp Sci] Binary tree Excersize
  90. 2015-02-23 Ruben Safir <mrbrklyn-at-panix.com> Re: [LIU Comp Sci] Binary tree Excersize
  91. 2015-02-23 Keisha Sylvester <keisha.sylvester-at-my.liu.edu> Re: [LIU Comp Sci] Binary tree Excersize
  92. 2015-02-23 Ruben Safir <mrbrklyn-at-panix.com> Re: [LIU Comp Sci] Binary tree Excersize
  93. 2015-02-23 Ruben <ruben.safir-at-my.liu.edu> Re: [LIU Comp Sci] Binary tree Excersize
  94. 2015-02-23 Ruben Safir <mrbrklyn-at-panix.com> Re: [LIU Comp Sci] scheduler resources
  95. 2015-02-23 Maneesh Kongara <maneeshkongara-at-gmail.com> Re: [LIU Comp Sci] Study Schedule for Tuesday
  96. 2015-02-23 Ruben Safir <mrbrklyn-at-panix.com> Re: [LIU Comp Sci] Study Schedule for Tuesday
  97. 2015-02-23 Ruben Safir <mrbrklyn-at-panix.com> Subject: [LIU Comp Sci] Operating Systems Class on Friday
  98. 2015-02-23 Ruben Safir <mrbrklyn-at-panix.com> Subject: [LIU Comp Sci] scheduler resources
  99. 2015-02-23 Ruben <ruben.safir-at-my.liu.edu> Subject: [LIU Comp Sci] Study Schedule for Tuesday
  100. 2015-02-24 From: "keisha.sylvester" <keisha.sylvester-at-my.liu.edu> RE: Re: [LIU Comp Sci] Binary tree Excersize
  101. 2015-02-24 Ruben Safir <mrbrklyn-at-panix.com> Re: Re: [LIU Comp Sci] Binary tree Excersize
  102. 2015-02-24 From: "keisha.sylvester" <keisha.sylvester-at-my.liu.edu> RE: Re: [LIU Comp Sci] Study Schedule for Tuesday
  103. 2015-02-24 Maneesh Kongara <maneeshkongara-at-gmail.com> Re: [LIU Comp Sci] Binary tree Excersize
  104. 2015-02-24 Ruben Safir <mrbrklyn-at-panix.com> Re: [LIU Comp Sci] Binary tree Excersize
  105. 2015-02-24 Keisha Sylvester <keisha.sylvester-at-my.liu.edu> Re: [LIU Comp Sci] Study anyone??
  106. 2015-02-24 Ruben Safir <mrbrklyn-at-panix.com> Subject: [LIU Comp Sci] Study anyone??
  107. 2015-02-25 Ruben <ruben.safir-at-my.liu.edu> Re: [LIU Comp Sci] Binary tree Excersize
  108. 2015-02-25 Ruben Safir <mrbrklyn-at-panix.com> Re: [LIU Comp Sci] Binary tree Excersize
  109. 2015-02-25 Keisha Sylvester <keisha.sylvester-at-my.liu.edu> Re: [LIU Comp Sci] Binary tree Excersize
  110. 2015-02-26 Ruben <mrbrklyn-at-panix.com> Re: [LIU Comp Sci] Binary tree Excersize
  111. 2015-02-26 Ruben Safir <mrbrklyn-at-panix.com> Subject: [LIU Comp Sci] Campus
  112. 2015-02-26 Ruben <ruben.safir-at-my.liu.edu> Subject: [LIU Comp Sci] Fwd: [NYLXS - HANGOUT] Bios
  113. 2015-02-26 Ruben <ruben.safir-at-my.liu.edu> Subject: [LIU Comp Sci] Re: Fwd: [NYLXS - HANGOUT] Bios
  114. 2015-02-26 Ruben Safir <mrbrklyn-at-panix.com> Subject: [LIU Comp Sci] [mrbrklyn-at-panix.com: (fwd) Re: Role of functional dependencies in
  115. 2015-02-26 Ruben Safir <mrbrklyn-at-panix.com> Subject: [LIU Comp Sci] [mrbrklyn-at-panix.com: (fwd) Re: Role of functional dependencies in
  116. 2015-02-26 Ruben Safir <mrbrklyn-at-panix.com> Subject: [LIU Comp Sci] [mrbrklyn-at-panix.com: (fwd) Re: Role of functional dependencies in
  117. 2015-02-26 Ruben Safir <mrbrklyn-at-panix.com> Subject: [LIU Comp Sci] [mrbrklyn-at-panix.com: (fwd) Re: Role of functional dependencies in
  118. 2015-02-26 Ruben Safir <mrbrklyn-at-panix.com> Subject: [LIU Comp Sci] [mrbrklyn-at-panix.com: (fwd) Re: Role of functional dependencies in
  119. 2015-02-26 Ruben Safir <mrbrklyn-at-panix.com> Subject: [LIU Comp Sci] [mrbrklyn-at-panix.com: (fwd) Re: Role of functional dependencies in
  120. 2015-02-26 Ruben Safir <mrbrklyn-at-panix.com> Subject: [LIU Comp Sci] [mrbrklyn-at-panix.com: (fwd) Re: Role of functional dependencies in
  121. 2015-02-26 Ruben Safir <mrbrklyn-at-panix.com> Subject: [LIU Comp Sci] [mrbrklyn-at-panix.com: (fwd) Re: Role of functional dependencies in
  122. 2015-02-26 Ruben Safir <mrbrklyn-at-panix.com> Subject: [LIU Comp Sci] [mrbrklyn-at-panix.com: (fwd) Re: Role of functional dependencies in
  123. 2015-02-26 Ruben Safir <mrbrklyn-at-panix.com> Subject: [LIU Comp Sci] [mrbrklyn-at-panix.com: (fwd) Re: Role of functional dependencies in
  124. 2015-02-26 Ruben Safir <mrbrklyn-at-panix.com> Subject: [LIU Comp Sci] [mrbrklyn-at-panix.com: (fwd) Re: Role of functional dependencies in
  125. 2015-02-26 Ruben Safir <mrbrklyn-at-panix.com> Subject: [LIU Comp Sci] [mrbrklyn-at-panix.com: (fwd) Re: Role of functional dependencies in
  126. 2015-02-26 Ruben Safir <mrbrklyn-at-panix.com> Subject: [LIU Comp Sci] [mrbrklyn-at-panix.com: (fwd) Role of functional dependencies in
  127. 2015-02-26 Ruben Safir <mrbrklyn-at-panix.com> Subject: [mrbrklyn-at-panix.com: (fwd) Re: [LIU Comp Sci] Need tutoring on
  128. 2015-02-26 Ruben Safir <mrbrklyn-at-panix.com> Subject: [mrbrklyn-at-panix.com: (fwd) Re: [LIU Comp Sci] Need tutoring on
  129. 2015-02-26 Ruben Safir <mrbrklyn-at-panix.com> Subject: [mrbrklyn-at-panix.com: (fwd) Re: [LIU Comp Sci] Need tutoring on
  130. 2015-02-26 Ruben Safir <mrbrklyn-at-panix.com> Subject: [mrbrklyn-at-panix.com: (fwd) Re: [LIU Comp Sci] Need tutoring on
  131. 2015-02-27 Ruben Safir <mrbrklyn-at-panix.com> Subject: [LIU Comp Sci] a hate this question
  132. 2015-02-27 Ruben Safir <mrbrklyn-at-panix.com> Subject: [LIU Comp Sci] Allorithms Midterm
  133. 2015-02-27 Ruben Safir <mrbrklyn-at-panix.com> Subject: [LIU Comp Sci] Read the FUCKING NOTES
  134. 2015-02-28 Ruben Safir <mrbrklyn-at-panix.com> Subject: [LIU Comp Sci] Allgorithm Examination
  135. 2015-02-28 Ruben <ruben.safir-at-my.liu.edu> Subject: [LIU Comp Sci] Linked List Test Question
  136. 2015-02-28 Ruben Safir <mrbrklyn-at-panix.com> Subject: [LIU Comp Sci] Re: [NYLXS - HANGOUT] Read the FUCKING NOTES
  137. 2015-02-28 Ruben Safir <mrbrklyn-at-panix.com> Subject: [LIU Comp Sci] [prmarino1-at-gmail.com: Re: [NYLXS - HANGOUT] Read the FUCKING NOTES

NYLXS are Do'ers and the first step of Doing is Joining! Join NYLXS and make a difference in your community today!