# [PYTHON MATRIX-SIG] fft's

**Konrad HINSEN
**
hinsenk@ere.umontreal.ca

*Wed, 28 Feb 1996 17:41:18 -0500*

>* > > LDA - INTEGER.
*>* > > On entry, LDA specifies the first dimension of the
*>* > > array SEQUENCE as declared in the calling (sub)program.
*>* > > LDA must be at least max( 1, 2*((N1+2)/2) ).
*>* > > Unchanged on exit.
*>* >
*>* > and this the physical size of the grid. The reason for having both
*>* > is that you might want to dimension some arrays larger than necessary
*>* > to avoid recompilation for every different value of N1/N2.
*>*
*>* This is what I thought, except that the formula for LDA's minimum size
*>* seems to imply that it must be at least *1 larger* than N1? Perhaps
*>* the library module uses this as temp space?
*
The minimum value is nonsense. The smallest reasonable value for N1 is
1, which makes 2*((N1+2)/2) = 2, which is always larger than 1.
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Konrad Hinsen | E-Mail: hinsenk@ere.umontreal.ca
Departement de chimie | Tel.: +1-514-343-6111 ext. 3953
Universite de Montreal | Fax: +1-514-343-7586
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