Thomas Kahle

Newer versions of netcat support both IPv4 and IPv6 and (for example) on Ubunutu 16.04 there is only on netcat package. This newer version of netcat does not have the...

jbig2enc fails to compile against leptonica-1.70 and higher

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Hi, In Gentoo we have some trouble building jbig2enc with newer versions of leptonica. This looks like an interface change in the leptonica library maybe? https://bugs.gentoo.org/show_bug.cgi?id=513954 Cheers, Thomas

Toolpath to SD is not functional anymore in Cura 15

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I just upgraded to the new version of Cura and the "Toolpath to SD" is now disfunctional. It correctly switches between Save and SD when the card is inserted/ejected, but...

Injective and irreducible resolutions of Q-graded modules

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This is a draft pull request as recommended [here](https://docs.oscar-system.org/stable/DeveloperDocumentation/new_developers/). Anna Hofer @annahofer00 has been working on an implementation of the [algorithms of Helm/Miller](https://arxiv.org/abs/math/0309256) and here we are now trying to...

The problem is in the title. Here is an example: ``` R = QQ[x,y, Degrees=>{{1,0},{0,1}}] isRegularSequence {x,y} ``` yields `false`. After a brief look at the code. It is doing...

Error messages for non-graded homomorphisms between graded rings

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Currently one can create a homomorphism between graded rings that is not graded and whose kernel is not homogeneous: ``` julia> R,t = graded_polynomial_ring(QQ, 1, :t) (Graded multivariate polynomial ring...

Dimension inconsistency with zero module and return type of ext functor

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**Describe the bug** Two different conventions seem to be implemented for what the dimension of the zero module is. I think it should be -1 or -\infty because in commutative...