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  • factorial - Why does 0! = 1? - Mathematics Stack Exchange
    Possible Duplicate: Prove $0! = 1$ from first principles Why does $0! = 1$? All I know of factorial is that $x!$ is equal to the product of all the numbers that come
  • Mathematics Stack Exchange
    Q A for people studying math at any level and professionals in related fields
  • Is zero positive or negative? - Mathematics Stack Exchange
    Some people (like me) might be looking for specific domains where people are concerned about the positivity of zero A reasonable place to start is to search "strictly positive" or "strictly negative" in your favorite academic search engine Those terms are used when there must be no ambiguity in whether or not a set of positive or negative numbers includes zero I'd like criticisms of that
  • trigonometry - Why are angles in degrees converted into degrees . . .
    As an example, I downloaded some GPS data from my camera the other day in which I found numbers like $4215 983 $ This turned out to represent $42$ degrees and $15 983$ minutes If you go to a particular latitude and longitude on Google Maps it will show the latitude and longitude both in degrees with a decimal fraction and also in degrees, minutes, and seconds with a decimal fraction
  • Who first defined truth as adæquatio rei et intellectus?
    António Manuel Martins claims (@44:41 of his lecture quot;Fonseca on Signs quot;) that the origin of what is now called the correspondence theory of truth, Veritas est adæquatio rei et intellectus
  • What is the difference between Fourier series and Fourier . . .
    What's the difference between Fourier transformations and Fourier Series? Are they the same, where a transformation is just used when its applied (i e not used in pure mathematics)?
  • Good book for self study of a First Course in Real Analysis
    Does anyone have a recommendation for a book to use for the self study of real analysis? Several years ago when I completed about half a semester of Real Analysis I, the instructor used "Introducti
  • What are the criteria for bad faith questions?
    The main criteria is that it be asked in bad faith ;-) I'm not entirely insincere: The question is rather how can we tell that, and a big part of the answer is "context"; it's not mainly the question itself
  • Is it really impossible to use hexagons for mixed-resolution cover?
    Motivation and illustration The cell (and its refiniment) is a central concept of the DGGS standard (ISO 19170-1 or OGC Topic 21), and, as a regular tile system, the only possible shapes are triangular, hexagonal or quadrilateral But, when the task is subpaving, that is "to cover with multiple grid-scales and without holes or overlaps", seems it is impossible with hexagons It is? Is
  • complex analysis - Show that the function $f (z) = \log (z-i)$ is . . .
    Ok but the result ends up being the same, $u_ {xx} + u_ {yy}$ is never becoming zero since it is $\frac {x+y-1} {\sqrt {x^2 + (y-1)^2}}$





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