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  1. Who first defined truth as "adæquatio rei et intellectus"?

    Mar 28, 2022 · António Manuel Martins claims (@44:41 of his lecture "Fonseca on Signs") that the origin of what is now called the correspondence theory of truth, Veritas …

  2. factorial - Why does 0! = 1? - Mathematics Stack Exchange

    The theorem that $\binom {n} {k} = \frac {n!} {k! (n-k)!}$ already assumes $0!$ is defined to be $1$. Otherwise this would be restricted to $0 <k < n$. A reason that we do define $0!$ to be …

  3. Difference between PEMDAS and BODMAS. - Mathematics Stack …

    Dec 21, 2022 · Division is the inverse operation of multiplication, and subtraction is the inverse of addition. Because of that, multiplication and division are actually one step done together from …

  4. matrices - How to multiply a 3x3 matrix with a 1x3 matrix ...

    I have 2 matrices and have been trying to multiply them but to no avail. Then I found this online site and trying feeding it the values but yet no success. - R' . T is what i would like to do but ...

  5. Why is $\infty\times 0$ indeterminate? - Mathematics Stack …

    "Infinity times zero" or "zero times infinity" is a "battle of two giants". Zero is so small that it makes everyone vanish, but infinite is so huge that it makes everyone infinite after multiplication. In …

  6. Prove that $1^3 + 2^3 + ... + n^3 = (1+ 2 + ... + n)^2$

    HINT: You want that last expression to turn out to be $\big (1+2+\ldots+k+ (k+1)\big)^2$, so you want $ (k+1)^3$ to be equal to the difference $$\big (1+2+\ldots+k+ (k+1)\big)^2- …

  7. Why the number e (=2.71828) was chosen as the natural base for ...

    Possible Duplicate: What's so “natural” about the base of natural logarithms? Why the number e(=2.71828) was chosen as the natural base for logarithm functions ? Mainly I am interested in …

  8. Taylor Series for $\log (x)$ - Mathematics Stack Exchange

    Nov 29, 2013 · the Taylor series for ln (x) is relatively simple : 1/x , -1/x^2, 1/x^3, -1/x^4, and so on iirc. log (x) = ln (x)/ln (10) via the change-of-base rule, thus the Taylor series for log (x) is just …

  9. Is there an identity for cos (ab)? - Mathematics Stack Exchange

    May 9, 2014 · Might not be too helpful, but you can expand $\cos ( (a+b)^2)$ and use the identities you have above to get a formula for $\cos (ab)$.

  10. How does one prove Rodrigues' formula for Legendre Polynomials?

    Apr 6, 2017 · (The general formula of Legendre Polynomial s is given by following equation: $$ P_k (x)=\sum_ {m=0}^ {\frac {k} {2}|\frac {k-1} {2}} {\frac { (-1)^m (2k-2m)!} {2^km ...