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On Thu, 3 Jun 1999, Alexander B. Konovalov wrote:

> does anybody know what hardware resources are necessary to compute

> normalized units group of group algebra of group of order 32 over GF(2),

> using the function NormalizedUnitsGroupRing ?

>

> I have tried to do this under Linux on Pentium-166 with RAM 32 Mb and

> swap partition of 50 Mb, and even with "-30m" parameter this calculation

> was terminated with message like "cannot allocate workspace" after

> about 5 minutes of work.

I don't know how much space it will take, but give those symptoms it

sounds as if it needs some space for each element. You say there are 2^31

elements, so *at one bit per element* you will need 2gigabits, or 256Mb.

It may use more than one bit per element, in which case you will need

a multiple of 256Mb.

Perhaps someone else on the list can tell you whether the calculation

can be done without using a bit for each element.

Note that many versions of linux need reconfiguring to use a swap

partition >128Mb (although they are happy with multiple swap partitions).

Dr. Andrew C. Aitchison Computer Officer, DPMMS, Cambridge

A.C.Aitchison@dpmms.cam.ac.uk http://www.dpmms.cam.ac.uk/~werdna

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