Thorbjørn Ravn Andersen
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 Jan16 comment Why do Fourier Series work? It is most likely more intuitive when you have learned complex numbers. Sep24 awarded Autobiographer Sep18 answered why binary is read right to left Aug19 comment How far can one see over the ocean? Note that this calculates the distance to the horizont where the completely smooth Earth begins to be in the way of itself. In order words, the distance where you can see the whole orc, including soles of his shoes. If you can live with seeing less of the orc, the distance is greater. Aug8 comment How much gas does a car use to carry its own gas? @NathanCooper I just think you made the problem NP-complete by introducing price flunctuations ;) Aug8 comment How much gas does a car use to carry its own gas? A similar problem is food depots when using dog sleighs to reach a given pole. You need a previous dog sleigh to put the last depot, so that trip also requires depots. If you need to go really far, the last depot becomes quite expensive to put. Aug8 comment How much gas does a car use to carry its own gas? @SargeBorsch you could let the car run in neutral and the engine off while taking off speed. Optimally you would know exactly when to turn the engine off for the car to stop in the right spot on the gas station. Aug8 awarded Commentator Aug8 comment How much gas does a car use to carry its own gas? @chriswynnyk resulting in you stopping at every fuel tank on the way (but of course, time was not asked for) Jul22 comment Making 400k random choices from 400k samples seems to always end up with 63% distinct choices, why? If you are concerned about the quality of your PRNG, tests are available to determine if it behaves as a true RNG which you may consider running. Jun27 comment Subtraction by addition For this to work it is important that you stay within a given number of digits and discard those outside. Otherwise 9+3 will be 12 and not 2. May17 awarded Editor May17 revised Why is cos(90)=0.4 in WebGL? Descriptive title May17 suggested approved edit on Why is cos(90)=0.4 in WebGL? Apr25 comment Does 17% have to be equal to 0.17? It needs to be 0.17 times something. Feb23 comment How do you describe your mathematical research in layman's terms? Which open problems do you usually mention? Feb21 comment LaTeX/TeX Vs. Mathematica for Typesetting What if you want to collaborate with persons who don't have Mathematica? Feb21 comment How do you describe your mathematical research in layman's terms? Study Feinmann - his lectures are really good. "Math is just a trick to avoid counting". Feb21 awarded Citizen Patrol Apr28 comment Does $\frac{x}{x}=1$ when $x=\infty$? Note that there are different kinds of infinity. There are infinitely many integers and infinitely many real numbers just between 0 and 1. How many real numbers are there then?