[#10492] Ruby 1.8.6 preview3 has been released — "Akinori MUSHA" <knu@...>

Hi,

26 messages 2007/03/04
[#10500] Re: Ruby 1.8.6 preview3 has been released — Hugh Sasse <hgs@...> 2007/03/05

On Mon, 5 Mar 2007, Akinori MUSHA wrote:

[#10507] Dynamic Array#join with block — <noreply@...>

Patches item #9055, was opened at 2007-03-05 19:57

12 messages 2007/03/05
[#10520] Re: [ ruby-Patches-9055 ] Dynamic Array#join with block — Nobuyoshi Nakada <nobu@...> 2007/03/06

Hi,

[#10594] grave bug in 1.8.6's thread implementation — Sylvain Joyeux <sylvain.joyeux@...4x.org>

In ext/thread/thread.c, remove_one leaves the list in an inconsistent state.

15 messages 2007/03/14
[#10596] Re: [PATCH] grave bug in 1.8.6's thread implementation — MenTaLguY <mental@...> 2007/03/14

On Thu, 15 Mar 2007 00:15:57 +0900, Sylvain Joyeux <sylvain.joyeux@m4x.org> wrote:

[#10597] Re: [PATCH] grave bug in 1.8.6's thread implementation — Sylvain Joyeux <sylvain.joyeux@...4x.org> 2007/03/14

> > The fix is in thread-mutex-remove_one.diff.

[#10598] Re: [PATCH] grave bug in 1.8.6's thread implementation — MenTaLguY <mental@...> 2007/03/14

On Thu, 15 Mar 2007 01:19:04 +0900, Sylvain Joyeux <sylvain.joyeux@m4x.org> wrote:

[#10599] Re: [PATCH] grave bug in 1.8.6's thread implementation — Sylvain Joyeux <sylvain.joyeux@...4x.org> 2007/03/14

On Wednesday 14 March 2007 17:29, MenTaLguY wrote:

[#10600] Re: [PATCH] grave bug in 1.8.6's thread implementation — MenTaLguY <mental@...> 2007/03/14

On Thu, 15 Mar 2007 01:48:42 +0900, Sylvain Joyeux <sylvain.joyeux@m4x.org> wrote:

[#10615] Multiton in standard library — TRANS <transfire@...>

Hi--

16 messages 2007/03/15
[#10619] Re: Multiton in standard library — Tom Pollard <tomp@...> 2007/03/16

[#10620] Re: Multiton in standard library — TRANS <transfire@...> 2007/03/16

On 3/15/07, Tom Pollard <tomp@earthlink.net> wrote:

[#10646] Marshal.dump shouldn't complain about singletons if the _dump method is defined — <noreply@...>

Bugs item #9376, was opened at 2007-03-19 15:58

12 messages 2007/03/19
[#10647] Re: [ ruby-Bugs-9376 ] Marshal.dump shouldn't complain about singletons if the _dump method is defined — Urabe Shyouhei <shyouhei@...> 2007/03/19

noreply@rubyforge.org wrote:

[#10648] Re: [ ruby-Bugs-9376 ] Marshal.dump shouldn't complain about singletons if the _dump method is defined — Sylvain Joyeux <sylvain.joyeux@...4x.org> 2007/03/19

On Monday 19 March 2007 18:01, Urabe Shyouhei wrote:

[#10651] Re: [ ruby-Bugs-9376 ] Marshal.dump shouldn't complain about singletons if the _dump method is defined — Yukihiro Matsumoto <matz@...> 2007/03/19

Hi,

[#10665] Re: [ ruby-Bugs-9376 ] Marshal.dump shouldn't complain about singletons if the _dump method is defined — "Chris Carter" <cdcarter@...> 2007/03/20

On 3/19/07, Yukihiro Matsumoto <matz@ruby-lang.org> wrote:

[#10712] Ruby Method Signatures (was Re: Multiton in standard library) — "Rick DeNatale" <rick.denatale@...>

On 3/19/07, TRANS <transfire@gmail.com> wrote:

10 messages 2007/03/21
[#10715] Re: Ruby Method Signatures (was Re: Multiton in standard library) — Jos Backus <jos@...> 2007/03/22

On 3/19/07, TRANS <transfire@gmail.com> wrote:

[#10798] Virtual classes and 'real' classes -- why? — "John Lam (CLR)" <jflam@...>

I was wondering if someone could help me understand why there's a parallel =

12 messages 2007/03/28
[#10799] Re: Virtual classes and 'real' classes -- why? — MenTaLguY <mental@...> 2007/03/28

On Thu, 29 Mar 2007 04:44:16 +0900, "John Lam (CLR)" <jflam@microsoft.com> wrote:

[ ruby-Bugs-9360 ] Matrix inverse problem

From: <noreply@...>
Date: 2007-03-18 22:41:56 UTC
List: ruby-core #10634
Bugs item #9360, was opened at 2007-03-18 23:41
You can respond by visiting: 
http://rubyforge.org/tracker/?func=detail&atid=1698&aid=9360&group_id=426

Category: Standard Library
Group: 1.8.6
Status: Open
Resolution: None
Priority: 3
Submitted By: Stefan M端hlebach (muehlebach)
Assigned to: Nobody (None)
Summary: Matrix inverse problem

Initial Comment:
There is a problem with the Matrix.inverse method.
Given the following matrix

    m = Matrix[[0.417787968829298, 0.542037605627772, 0.729142268138943],
    [0.0, 6.12303176911189e-17, 1.0],
    [-0.542037605627772, 0.417787968829298, -2.55812900589452e-17]]

the result of

    m.inverse * m

is

    [[1.0, 0.0, 0.650423523448542],
    [5.55111512312578e-17, 1.0, 0.84385869292008],
    [0.0, 9.24446373305873e-33, 1.0]]

but it should be

    [[1.0, 0.0, 0.0],
    [0.0, 1.0, 0.0],
    [0.0, 0.0, 1.0]]

or close to this!


----------------------------------------------------------------------

You can respond by visiting: 
http://rubyforge.org/tracker/?func=detail&atid=1698&aid=9360&group_id=426

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