*From*: "Andreas J. Guelzow" <aguelzow taliesin ca>*To*: Leonard Mada <discoleo gmx net>*Cc*: gnumeric-list gnome org, o menubar gnome org*Subject*: Re: OASIS: Infix Operator "^"*Date*: Thu, 22 Feb 2007 14:39:16 -0700

On Thu, 2007-22-02 at 23:34 +0200, Leonard Mada wrote:

Andreas J Guelzow wrote:Unfortunately there is a significant discrepancy of the normal mathematical definitions and what is used in spreadsheets.However, there is NO discrepancy what mathematicians use. Also, dedicated mathematical programs are fairly consistent with these precedence rules. I therefore recommend to every developer of a mathematical standard to have first a look at Mathematica.

I am not sure why with respect to a mathematical standard one would want to look at the implementation in an arbitrary software product. In any case the OpenFormula standard is supposed to be a standard for a file format, not a Mathematical Standard.

2. The classic ERROR: -4^2 Mathematically, this yields always -(4^2)=-16, NEVER +16!!! There is NO unary operator in mathematics that converts a number to its negative, like described in the documents.This is utter nonsense. Of course there is such a unary operator. ...NO, there is NO such unary operator: -x^2 = -x * -x = + x^2, THIS is NONSENSE. Such a unary operator does NOT exist.

What is the - in -x if not a unary operator? Andreas Guelzow -- "Liberty consists less in acting according to one's own pleasure, than in not being subject to the will and pleasure of other people. It consists also in our not subjecting the wills of other people to our own." Rousseau Prof. Dr. Andreas J. Guelzow Dept. of Mathematical & Computing Sciences Concordia University College of Alberta

**Follow-Ups**:**Re: OASIS: Infix Operator "^"***From:*Leonard Mada

**References**:**OASIS: Infix Operator "^"***From:*Leonard Mada

**Re: OASIS: Infix Operator "^"***From:*Leonard Mada

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