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41962
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location Ann Arbor, MI
age 76
visits member for 1 year, 10 months
seen 6 hours ago

I am a retired software developer. I retired at the end of 2003 and since then my computer programming activities have been for recreational purposes. I find Mathematica excellent for that.

I started using Mathematica in 1997 (Ver. 3). I am currently using Ver. 9. Although I have used Mathematica for all kinds of stuff, I use it mostly to pursue my long standing interest in Euclidean geometry, both in the classical Greek synthetic form and in the more modern analytical form.


2d
revised How can I get the function of a plotted trajectory?
Made English more idiomatic
2d
comment Is it possible to add page break in front-end?
It is also available on the left-click contextual menu.
2d
reviewed Close The i-th element of a permutation
2d
comment How to combine one or more rotated graphics objects?
@Rojo. Yes, but it's rather the long way around the barn (as we say in the US), don't you think. This post is to make sure beginners see the way it normally done when they read this questions and its answers.
2d
revised How to tell NDSolve about known relations of the exact solution
Improved formatting
2d
revised Convex hull of a large data set of 3D points
Made English clearer and more idiomatic
2d
comment Why isn't Lookup treated like other symbols?
Let us continue this discussion in chat.
2d
comment Why isn't Lookup treated like other symbols?
I don't think the OP contemplated modifying any built-in functions. He seems unaware of the difference between standard evaluation and non-standard evaluation, so he thought creating up-values, which does not involve modifying built-ins, would work. Modifying Lookup may be required, but it was not assumed a priori.
2d
comment Why isn't Lookup treated like other symbols?
Then I think you have a responsibility to th readers of your answer to warn them of the possible pitfalls.
2d
comment Why isn't Lookup treated like other symbols?
Don't you think removing HoldAllComplete is dangerous to the normal functioning of LookUp?
2d
revised Customizing display of partial differential equations
Middling clean-up
2d
reviewed Leave Open How to combine one or more rotated graphics objects?
2d
reviewed Close How to get matching starting dates for different `FinancialData` properties?
2d
answered How to combine one or more rotated graphics objects?
2d
revised Text with subscript is automatically Italic
added update to answer extended version of the question
Aug
20
answered Why isn't Lookup treated like other symbols?
Aug
20
reviewed Close How do I write “such that” in mathematica?
Aug
20
comment Solving $L=\frac{3}{2} \sqrt{4 \pi ^2 A^2+W^2}-\frac{\sqrt{5 W \sqrt{4 \pi ^2 A^2+W^2}+6 \pi ^2 A^2+3 W^2}}{\sqrt{2}}+\frac{3 W}{2}$ for $W$
Mission accomplished :D
Aug
20
comment Solving $L=\frac{3}{2} \sqrt{4 \pi ^2 A^2+W^2}-\frac{\sqrt{5 W \sqrt{4 \pi ^2 A^2+W^2}+6 \pi ^2 A^2+3 W^2}}{\sqrt{2}}+\frac{3 W}{2}$ for $W$
Indeed, but it's an archaic/poetic form of "to" or "until". The idiom is "sic your dog on/onto trespassers", not "sic your dog to/until trespassers"
Aug
20
comment Solving $L=\frac{3}{2} \sqrt{4 \pi ^2 A^2+W^2}-\frac{\sqrt{5 W \sqrt{4 \pi ^2 A^2+W^2}+6 \pi ^2 A^2+3 W^2}}{\sqrt{2}}+\frac{3 W}{2}$ for $W$
Your equation was pretty ugly to start with. I say: ugly in, uglier out :-)