Viewing profile — mjcohen

So glad I am retired.

For some reason I read this as Making Referential Stupidity a Type

For math.stackexchange.com which uses MathJax, I use MacDown, a markdown editor with parallel windows, one showing the MathJax and the other (in real time) the rendered math. I fin…

The ternary operator is easy to nest if you put each clause on a separate line. Then it looks just like nested if-then-else.

Years ago, I used Acrobat to extract tables from a PDF. Had to do it manually, but it pasted nicely into Excel.

As usual, anything Trump and his minions touch turns to garbage.

I believe that I got the first external cassette drive for the PET on the west coast. Only used it a very few times. The big boost was when I got the floppy disk drive. I could do …

For a nice introduction to relativity, look at The Einstein Theory of Relativity: A Trip to the Fourth Dimension by Lillian R. Lieber. $15 on Amazon. Written in 1945 and still quit…

I enjoyed this article. I always find it interesting how things came to be and how individual contributions made things happen.

If you believe them.

As Victor said, his parents were very upset when they came home and found him in front of a roaring fire, because they did not have a fireplace.

Looks interesting. Should start with a definition of the Hyperbolic Tangent. It is only about 2/3 of the way that the definition occurs in a discussion of computing exp(x).

Damn. Never knew that. TIL

In the mid 70's, I was a graduate CS student at USC's Information Sciences Institute. I remember my feeling of awe when I used Arpanet (or was it Darpanet) to log into London and d…

Trump is clearly winning his war on America.

Not if the ratio between the largest and smallest floats is very large (2^(2^n)) where n is the number of bits in the exponent.

Like the old saying: Military justice is to justice as military music is to music

(I saw this on a math department bulletin board about 1960) A theorem both deep and profound States that every circle is round But in a paper by Erdos Written in Kurdish A countere…

Did you use the regular version or the one with multiple-precision values?

Clif bars recently went from 6 bars per box to 5. They write the 5 on the box as if it is something improved, not reduced.

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As Disney almost wrote: Everybody wants to be a bat Cause noone but a bat really knows where it's at

They will never own their mistakes. That's the point of lack of democracy.

Make sure that is legal where you are and, if needed, you have their permission.

There are enough evil people that the present is as bad as it is.