[#9722] Kernel#system broken inside Dir.chdir(&block) if system command doesn't have shell characters — <noreply@...>

Bugs item #7278, was opened at 2006-12-14 13:59

8 messages 2006/12/14

[#9749] System V IPC in standard library? — Steven Jenkins <steven.jenkins@...>

Back in August, I needed a semaphore to serialize access to an external

14 messages 2006/12/19

[#9753] CVS freeze — SASADA Koichi <ko1@...>

Hi,

20 messages 2006/12/20
[#9755] Re: [ruby-dev:30039] CVS freeze — SASADA Koichi <ko1@...> 2006/12/20

Hi,

[#9757] Re: [ruby-dev:30040] Re: CVS freeze — SASADA Koichi <ko1@...> 2006/12/20

Hi,

Re: [ ruby-Bugs-7001 ] Determinant Problem in Matrix.rb

From: Nex3 <nex342@...>
Date: 2006-12-01 16:45:25 UTC
List: ruby-core #9650
Steven Jenkins wrote:
> Just out of curiosity, are you trying to actually calculate something
> useful with determinants? The determinant is a powerful theoretical
> concept, but virtually useless computationally. That is, whatever you
> can do using a determinant can likely be done faster and more accurately
> using some other technique.
>
> For example, solving a linear system using Cramer's rule is an order of
> magnitude more work than Gaussian elimination.
>
> Steve
Actually, it first came up when I was checking my Linear Algebra 
homework in IRB :p.

- Nathan

In This Thread