From: ruby-core@...
Date: 2014-09-21T02:00:03+00:00
Subject: [ruby-core:65178] [ruby-trunk - Feature #10073] [PATCH] Implement Laplace expansion for matrix.

Issue #10073 has been updated by Marc-Andre Lafortune.


Looks good.

I'd change the interface slightly so we can call it with named parameters instead:

    m.laplace_expansion(row: k-1) == m.laplace_expansion(column: k-1) == m.det

Of course, m.laplace_expansion or m.laplace_expansion(row: 0, column: 0) would raise errors.

@gogo tanaka: what do you think about this?



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Feature #10073: [PATCH] Implement Laplace expansion for matrix.
https://bugs.ruby-lang.org/issues/10073#change-49017

* Author: gogo tanaka
* Status: Assigned
* Priority: Normal
* Assignee: Marc-Andre Lafortune
* Category: lib
* Target version: current: 2.2.0
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Laplace expansion has really important mathematical property.

We can handle many thing with this (determinant, cross product)

So I'm confident that this method is necessary.

But I recognize Ruby should be not for mathematician but rubyist.

Ruby doesn't need too academic method.

So If you think it is too academic you can ignore my patches.

gogo.

---Files--------------------------------
implement_Matrix#laplace_expansion.patch (3.31 KB)


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