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What does s. t. mean? - Mathematics Stack Exchange English is my second language and I have a question What does "s t " mean? $ \\text{min} \\quad f(x) = (x_1−2)^2+(x_2−1)^2 $ $ \\text{s t }\\qquad g_{1}(x) = x
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St. Petersburg Paradox - Mathematics Stack Exchange The problem with the St Petersburg paradox is similar to that with my makeshift example: In that one, you would be comfortable with playing this game if you could borrow money indefinitely, so that even if you lost everything, you could use loans to keep playing the game until you get to own the whole world In the St Petersburgs paradox, the situation is more complicated, given that you may
What does max [] mean? - Mathematics Stack Exchange Taking the maximal number amongst the parameters $\max\ {x_1,x_2\} = \cases {x_1, \text {if }x_1 > x_2\\x_2, \text {otherwise}}$ You can define like that the maximum of any finitely many elements When the parameters are an infinite set of values, then it is implied that one of them is maximal (namely that there is a greatest one, unlike the set $\ {-\frac {1} {n} | n\in\mathbb {N}\}$ where
How can I get faster at doing math? - Mathematics Stack Exchange Develop mental math skills: Strengthen your mental math abilities by practicing mental calculations, such as addition, subtraction, multiplication, and division Learn techniques like estimation, rounding, and simplification to quickly approximate and simplify calculations
(k+1)th, (k+1)st, k-th+1, or k+1? - Mathematics Stack Exchange From the Handbook of Writing for the Mathematical Sciences section 5 5 p 63: Here are examples of how to describe the position of a term in a sequence relative to a variable k: kth, (k+1)st, (k+2)nd, (k+3)rd, (k+4)th, … (zeroth, first, second, third, fourth, …) Generally, to describe the term in position k±i for a constant i, you append to (k±i) the ending of the ordinal number for
general version of $Z^*_ {st} \cong Z^*_ {s} \oplus Z^*_ {t}$ The rings $\mathbb {Z}_ {st}$ and $\mathbb {Z}_s \times \mathbb {Z}_t$ are isomorphic in this case, and so their respective groups of units are, too But yes, the Chinese Remainder Theorem makes this pretty automatic