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Welcome to the Google group for discussion of our planned matroid software package! Please keep your writing informal and colloquial, but be aware that it is planned to make the list public at some point in the not too distant future.
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Stefan van Zwam
, …
Dima Pasechnik
4
1/19/18
Google Summer of Code 2017
I added myself to the list again, with a similar collection of project suggestions to last year (
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Google Summer of Code 2017
I added myself to the list again, with a similar collection of project suggestions to last year (
1/19/18
Dima Pasechnik
,
Stefan van Zwam
2
1/19/18
an apparent bug in graphical matroids (graphic_coextension() )
Hi, It's not a bug, just a badly written doctest. The Matroid() function tries to guess a mapping
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an apparent bug in graphical matroids (graphic_coextension() )
Hi, It's not a bug, just a badly written doctest. The Matroid() function tries to guess a mapping
1/19/18
Rik Schepens
, …
Stefan van Zwam
5
4/7/16
Usage of _cached_info
Hi Stefan, The usage cached_method is not that relevant here indeed. Cached_info here is only used to
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Usage of _cached_info
Hi Stefan, The usage cached_method is not that relevant here indeed. Cached_info here is only used to
4/7/16
Charles Wang
,
Stefan van Zwam
5
3/7/16
possible bug in is_valid()
Oops. It's bitset_eq instead of bitset_equal. Cheers, Stefan. On Mar 7, 2016, at 12:21 PM,
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possible bug in is_valid()
Oops. It's bitset_eq instead of bitset_equal. Cheers, Stefan. On Mar 7, 2016, at 12:21 PM,
3/7/16
Stefan van Zwam
, …
Rudi Pendavingh
5
2/11/16
Google Summer of Code 2016
Hi Stefan, I cannot commit to supervising the summer of code, unfortunately. But I do have some
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Google Summer of Code 2016
Hi Stefan, I cannot commit to supervising the summer of code, unfortunately. But I do have some
2/11/16
Dillon Mayhew
, …
Rob Beezer
4
10/29/15
Feasibility of linear program
And I will add that this is the "pythonic" way. It is better to ask for forgiveness than to
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Feasibility of linear program
And I will add that this is the "pythonic" way. It is better to ask for forgiveness than to
10/29/15
Rudi Pendavingh
, …
Rob Beezer
6
6/6/15
imports in matroid.pyx
Dear Dima and Rob, thank you for your encouragement and your advice. I just started work on the sage
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imports in matroid.pyx
Dear Dima and Rob, thank you for your encouragement and your advice. I just started work on the sage
6/6/15
Dima Pasechnik
,
Stefan van Zwam
2
3/3/15
Fwd: is_valid returns True for invalid matroid
The problem arises because we check rank axioms in is_valid. The rank function computed from your M
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Fwd: is_valid returns True for invalid matroid
The problem arises because we check rank axioms in is_valid. The rank function computed from your M
3/3/15
Stefan van Zwam
,
Michael Welsh
3
2/12/15
Google Summer of Code
Ok, I put up a preliminary list here: http://wiki.sagemath.org/GSoC/2015#
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Google Summer of Code
Ok, I put up a preliminary list here: http://wiki.sagemath.org/GSoC/2015#
2/12/15
Dillon Mayhew
, …
Stefan van Zwam
18
11/30/14
Possible bug in Sage 6.2...?
Just a quick update: Rudi fixed the bug, it was reviewed and is included in Sage 6.5.beta1.
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Possible bug in Sage 6.2...?
Just a quick update: Rudi fixed the bug, it was reviewed and is included in Sage 6.5.beta1.
11/30/14
Vahid Hilbert
, …
Stefan van Zwam
7
9/15/14
help me for install matroid function on sage
tank you professor I find my mistake I did not adhere to the distance between the (=) and the word
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help me for install matroid function on sage
tank you professor I find my mistake I did not adhere to the distance between the (=) and the word
9/15/14
Dima Pasechnik
, …
Rudi Pendavingh
8
3/13/14
finding components of a linear matroid
On Tuesday, 11 March 2014 10:06:23 UTC, Rudi Pendavingh wrote: I misread your statement >>>
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finding components of a linear matroid
On Tuesday, 11 March 2014 10:06:23 UTC, Rudi Pendavingh wrote: I misread your statement >>>
3/13/14
Rajesh Veeranki
, …
Stefan van Zwam
4
2/15/14
Problems implementing Matroid Union, Ticket 14667
Hi, Thanks Prof.Rudi and Prof.Stefan for the suggestions. I think i found out the reason.As per my
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Problems implementing Matroid Union, Ticket 14667
Hi, Thanks Prof.Rudi and Prof.Stefan for the suggestions. I think i found out the reason.As per my
2/15/14
Stefan van Zwam
,
Rudi Pendavingh
2
2/6/14
Google Summer of Code
Hi Stefan, 1) I can be mentor, but not (or only very lightly) in the period from 5/7 to 17/8 -- and
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Google Summer of Code
Hi Stefan, 1) I can be mentor, but not (or only very lightly) in the period from 5/7 to 17/8 -- and
2/6/14
Gordon
, …
Rob Beezer
6
12/5/13
SetSystem
On 12/04/2013 11:05 PM, Michael Welsh wrote: > I just looked at the sage-matroid source code.
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SetSystem
On 12/04/2013 11:05 PM, Michael Welsh wrote: > I just looked at the sage-matroid source code.
12/5/13
Gordon
,
Stefan van Zwam
3
11/5/13
Some basics..
Hi Gordon, > Here is something that I would like to work, but it doesn't... > > sage:
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Some basics..
Hi Gordon, > Here is something that I would like to work, but it doesn't... > > sage:
11/5/13
Gordon
11/4/13
Some basics II
Some more questions based on the following data - basically, what is determining the time taken? Is
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Some basics II
Some more questions based on the following data - basically, what is determining the time taken? Is
11/4/13
Volker Braun
10/5/13
circular imports
There seem to be issues with circular imports. See http://trac.sagemath.org/15130 for details. Here
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circular imports
There seem to be issues with circular imports. See http://trac.sagemath.org/15130 for details. Here
10/5/13
Stefan
10/2/13
Re: aut codes patch
On Wednesday, October 2, 2013 2:46:45 AM UTC-4, Thomas Feulner wrote: The last post to this thread is
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Re: aut codes patch
On Wednesday, October 2, 2013 2:46:45 AM UTC-4, Thomas Feulner wrote: The last post to this thread is
10/2/13
Dima Pasechnik
, …
Volker Braun
12
8/30/13
total unimodularity testing - algorithm?
On 2013-08-29, Dima Pasechnik <dim...@gmail.com> wrote: > On 2013-08-29, Volker Braun <
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total unimodularity testing - algorithm?
On 2013-08-29, Dima Pasechnik <dim...@gmail.com> wrote: > On 2013-08-29, Volker Braun <
8/30/13
Stefan van Zwam
,
Rudi Pendavingh
2
8/27/13
f-vector?
Hi Stefan, I think the term f-vector is defined for any graded lattice on a set X. The i-the entry of
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f-vector?
Hi Stefan, I think the term f-vector is defined for any graded lattice on a set X. The i-the entry of
8/27/13
Stefan van Zwam
, …
Henry Crapo
32
8/17/13
Huge patch on Trac 7477: Matroid theory
Dear Rudi, Thank you for your suggestions. I'll be tempted also to re-read Bill Tutte's
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Huge patch on Trac 7477: Matroid theory
Dear Rudi, Thank you for your suggestions. I'll be tempted also to re-read Bill Tutte's
8/17/13
Stefan van Zwam
, …
Volker Braun
7
8/5/13
Fundamentally flawed
On Monday, August 5, 2013 11:18:14 PM UTC+1, Stefan van Zwam wrote: Ah, I misunderstood your first
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Fundamentally flawed
On Monday, August 5, 2013 11:18:14 PM UTC+1, Stefan van Zwam wrote: Ah, I misunderstood your first
8/5/13
Michael Welsh
,
Stefan van Zwam
3
7/18/13
Citing sage-matroid
On 19/07/2013, at 1:43 PM, Stefan van Zwam <stefan...@gmail.com> wrote: > > That
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Citing sage-matroid
On 19/07/2013, at 1:43 PM, Stefan van Zwam <stefan...@gmail.com> wrote: > > That
7/18/13
Stefan van Zwam
, …
Rudi Pendavingh
9
6/10/13
Extensions, modular cuts
Hi Stefan, I misread your mail, thought you were talking about extensionS(). Now I have no '
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Extensions, modular cuts
Hi Stefan, I misread your mail, thought you were talking about extensionS(). Now I have no '
6/10/13
Stefan van Zwam
6/7/13
Bitbucket version broken for the time being
Hi all, In the review process for inclusion into Sage, it was requested that our bitset-related code
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Bitbucket version broken for the time being
Hi all, In the review process for inclusion into Sage, it was requested that our bitset-related code
6/7/13
Gordon
, …
Volker Braun
6
5/27/13
sagemath on Android
Should it be (can it be) removed or marked as broken? On Sun, May 26, 2013 at 6:04 PM, Volker Braun
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sagemath on Android
Should it be (can it be) removed or marked as broken? On Sun, May 26, 2013 at 6:04 PM, Volker Braun
5/27/13
Gordon
, …
Michael Welsh
16
5/24/13
matroids9 and strange bugs
On 24/05/2013, at 8:56 PM, Gordon Royle <gordon...@gmail.com> wrote: > > OK, finally
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matroids9 and strange bugs
On 24/05/2013, at 8:56 PM, Gordon Royle <gordon...@gmail.com> wrote: > > OK, finally
5/24/13
Gordon
,
Stefan van Zwam
2
5/20/13
pickling, saving and loading
Hi Gordon, Is pickling being automagically done for me by the Matroid class? It's being done
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pickling, saving and loading
Hi Gordon, Is pickling being automagically done for me by the Matroid class? It's being done
5/20/13
Gordon
, …
Rudi Pendavingh
4
5/17/13
MatroidSet
Yes, Rudi is correct. I'm just after the low-level structure that maintains a set of matroids and
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MatroidSet
Yes, Rudi is correct. I'm just after the low-level structure that maintains a set of matroids and
5/17/13