Has someone a Simplify that really simplifies?

• To: mathgroup at yoda.physics.unc.edu
• Subject: Has someone a Simplify that really simplifies?
• From: p617hfa at sun24.mpifr-bonn.mpg.de (Heino Falcke)
• Date: Tue, 15 Sep 92 10:43:25 +0200

```Hi mathgroup,

Mathematica very often returns rather complex algebraic results, which
colud be simplified enormously by some simple transformations,
grouping certain expressions and pulling out out non-numerical factors (like a x+a y +a z +w)->a (x+y+z+w/a). Using Simplify or Simplify //@ usually has only little effects althought some transformations are obvious e.g.

In[1]:= Simplify[a^2+2 a b +b^2]
2
Out[1]= (a + b)
In[2]:= Simplify[a^2+2 a b +b^2+x]                     (very simple example)
2            2
Out[2]= a  + 2 a b + b  + x

Has someone a better procedure for simplifying besides applying litteral replacement rules, for example a compilation of general transformation rules (or should one start to compile such a collection).

Heino Falcke, MPIfR Bonn

```

• Prev by Date: FindRoot problem fixed
• Next by Date: Re: Integrating Normal Distributions gives the wrong answer
• Previous by thread: FindRoot problem fixed
• Next by thread: Re: D[myFunc[g[x]]] -> myFunc[D[g[x],x]: How to do in ch