The set N of natural (counting) numbers enables an ordering by size (cardinality) of finite sets. Cantor's concept is a set of transfinite numbers that enable a similar ordering by size of infinite sets. He sees this as an extension of the number system, and considers a transfinite s...
The problem is equivalent to counting transitive factorisations of permutations into transpositions.) These results prove a conjecture of Goulden, Jackson and Vainshtein, and extend results of Hurwitz and many others. 展开 DOI: 10.1090/S0002-9947-01-02776-3 ...
but seem willing to let other countries do so, provided there are strict controls in place. The catch limit algorithm is just part of those controls, which is why it has been wrapped up within what has become the RMS. This, proposed by...
I am trying to write a function that determine if a file in a directory is of a gif/bmp/png/jpg extension. Right now I think I have correctly written my code all the way up to listing the files in the directory and opening them in binary mode. Now, I am struggling with figuring o...
盖矿砾之开，事繁而难成，工费不可必。所取有限，所伤必多，其事未可骤论也。惟番舶之往来，以吾岁出之货，而易其岁入之财。岁有所出，则于我毫无所损，而殖产交易，愈足以鼓艺业之勤。岁有所入，则在见其赢，而货贿会通，立可以祛贫寡之患。银两既以充溢，课饷赖为转输。数年之间，富...