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visits member for 2 years, 6 months
seen Jun 26 '13 at 15:59

I'm a retired college math teacher. I use Mathematica since version 2.2 and begun TeX with emTeX about 1990. Other languages I use are C, Perl, bash ...


May
9
comment Extract current viewing parameters from a 3D view?
@cormullion 1.) If you don't move, rotate, ... the grahphics with the mouse, the output will be an empty list. 2.) Yes, you have to Ctrl+Shilt+L the graphcs between the [ ]. The ll used in the definition will then be replaces by the graphic (which is a mathematica object like any other).
May
9
answered Extract current viewing parameters from a 3D view?
May
9
comment How to find the smallest root
@Artes Ok that is what we call a "weak" monotonic function.
May
9
comment How to find the smallest root
I'm a bit confused. For a monotonic, continuous, differentiable function F with supremum c all values F[t] are less then c. Or am I missing something? Could you show the definition of F?
May
9
answered About the number format in ticks
May
8
comment Solving complex equations
I think WRI has thougt about the Assumptions option of PowerExoand. I wrote the default were True, but it is Automatic. Look what Power[(a b)^n,Assumptions->#]&/@{Automatic,True} does. $Assumptions defaults to True, so Assumptions->$Assumptions is not appropriate for PowerExpand
May
8
answered Solving complex equations
May
8
comment Solving complex equations
Not all functions with Assumtion Option do have the default Assumptions->$Assumptions. AFAIK the only one which doesn't is PowerExpand with default Assumptions->True. So Assuming works only for Functions having the default option Assumptions->$Assumptions.
May
8
awarded  Nice Answer
May
7
revised Rationalize the Denominator by Default
corrected a typo in input.
May
7
comment Rationalize the Denominator by Default
@rmv sorry I missed to copy this definition. I've added it to my answer.
May
7
revised Rationalize the Denominator by Default
Added definition of EvaluiereAt
May
7
revised Rationalize the Denominator by Default
inserted a line break
May
7
answered Rationalize the Denominator by Default
May
7
awarded  Fanatic
May
7
answered Attaching persistent assumptions to symbol definition
May
6
answered Conditional expression
May
1
revised Is it possible to have Mathematica move all terms to one side of an equation?
changed comment to edit
May
1
answered Is it possible to have Mathematica move all terms to one side of an equation?
Apr
27
comment How can I style text like in the documentation?
Are you looking for the tutorial/EnteringTwoDimensionalInput in the Mathematica Documentation?