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fuss:mathematics [2014/09/13 23:34] – office | fuss:mathematics [2021/12/03 17:28] – [Fonts] office | ||
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+ | ====== Mnemonics ====== | ||
+ | ^ Constant ^ Mnemonic ^ | ||
+ | | $\pi$ |//How I like a drink, alcoholic of course, after the heavy lectures involving quantum mechanics.// | ||
+ | |||
+ | ====== Days in Month (Gregorian Calendar) ====== | ||
+ | |||
+ | < | ||
+ | 30 days hath September, | ||
+ | April, June and November, | ||
+ | All the rest have 31, | ||
+ | Excepting February alone | ||
+ | (And that has 28 days clear, | ||
+ | With 29 in each leap year). | ||
+ | </ | ||
+ | |||
+ | ====== Graphical Set-Based Representation of Logical Operators ====== | ||
+ | |||
+ | {{fuss: | ||
+ | |||
+ | ====== Fonts ====== | ||
+ | |||
+ | ^ Type ^ Usage ^ Latex Equivalents ^ | ||
+ | | italics without kerning and ligature rules | used for variables | ||
+ | | upright roman | abbreviations of operators, function names | ''< | ||
+ | | sans-serif and typewriter | not used except sometimes for special meaning | ''< | ||
+ | | math blackboard bold (calligraphic) | used mostly for sets | ''< | ||
+ | |||
+ | ====== Divisibility ====== | ||
+ | |||
+ | * by $2$, last digit in a number is divisible by $2$, | ||
+ | * by $3$, the result of all digits summed up in a number is divisible by $3$, | ||
+ | * by $4$, last two digits in a number form a smaller number that has to be divisible by $4$, | ||
+ | * by $5$, last digit divisible by $5$, | ||
+ | * by $10$, number ends in $0$ | ||
+ | ====== Index ====== | ||
+ | |||
+ | {{indexmenu> | ||