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21st Century M101

Image Credit: NASA, ESA, CXC, JPL - Caltech, STScI

Messier 45: The Daughters of Atlas and Pleione

Fourier Transform

KDE apps 2D graph.

1000 mathematical problem

SOLUTION TO 315. THE HAT-PEG PUZZLE. (1/2)

The moves will be made quite clear by a reference to the diagrams, which show the position on the board after each of the four moves. The darts indicate the successive removals that have been made. It will be seen that at every stage all the squares are either attacked or occupied, and that after the fourth move no queen attacks any other. In the case of the last move the queen in the top row might also have been moved one

Sea or Khwarizm Sea, a region near the Aral Sea in south-central Asia and the birthplace of the ninth-century mathematician Muhammad ibn-Musa al-Khwarizmi (780?-850?) en.wikipedia.org/wiki/Algorith

$\frac{n!}{k!(n-k)!} = \binom{n}{k}$

$f(n) = n^5 + 4n^2 + 2 |_{n=17}$

$a^2 + b^2 = c^2 \qedhere$

Happy $$\pi$$ day, Mathstodon!