Über Exoplaneten

Sibylle Anderl schreibt in der F.A.Z. über Exoplaneten.

Der Schlüssel zum Verständnis der Exoplaneten
http://www.faz.net/aktuell/wissen/weltraum/ferne-welten-der-schluessel-zum-verstaendnis-der-exoplaneten-15579292.html

Wau. Schon 4000 Exoplaneten. Und immer noch nix für uns Menschen dabei. Schade.

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Mathematics of Black Holes

Kevin Hartnett writes for Quanta Magazine about black holes.

Mathematicians Disprove Conjecture Made to Save Black Holes
https://www.quantamagazine.org/mathematicians-disprove-conjecture-made-to-save-black-holes-20180517/

Whoa. I didn’t know about the Cauchy horizon.

For mathematicians, = does not mean equality

Math ∩ Programming

Every now and then I hear some ridiculous things about the equals symbol. Some large subset of programmers—perhaps related to functional programmers, perhaps not—seem to think that = should only and ever mean “equality in the mathematical sense.” The argument usually goes,

Functional programming gives us back that inalienable right to analyze things by using mathematics. Never again need we bear the burden of that foul mutant x = x+1! No novice programmer—nay, not even a mathematician!—could comprehend such flabbergastery. Tis a pinnacle of confusion!

It’s ironic that so much of the merits or detriment of the use of = is based on a veiled appeal to the purity of mathematics. Just as often software engineers turn the tables, and any similarity to mathematics is decried as elitist jibber jabber (Such an archaic and abstruse use of symbols! Oh no, big-O!).

In fact, equality is more rigorously defined in…

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