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 Oct 14 answered Sphere equation given 4 points Feb 18 answered How to find the linear matrix of this linear transformation? Feb 12 answered Is there a commutative operation for which the inverse of the operation is also commutative? Aug 31 answered Calculate $n$ points having equal cartesian distance over a single sine wave Aug 29 answered finding volume of the cone by using the dot product May 17 answered What did Johann Bernoulli wrong in his proof of $\ln z=\ln (-z)$? Apr 4 answered Can a coin with an unknown bias be treated as fair? Jan 15 answered How to fast convert from Octal to Hexadecimal Dec 10 answered $1/i=i$. I must be wrong but why? Dec 6 answered Prove by induction that $5^n - 1$ is divisible by $4$. Nov 11 answered Measuring water puzzle Nov 8 asked How stable is my quaternion interpolation? Oct 31 answered Exponential equation in x,y,z Aug 27 answered Would the answer of the square root of a square root be positive or negative? Aug 13 answered Notations that are mnemonic outside of English May 12 answered Big O Notation reliability? Apr 11 answered what is the best way to win: every 1000 submission will win Mar 20 answered What's the difference between tuples and sequences? Feb 10 answered Locally Bounded Functional Equation $f(x+y) = f(x) + f(y)$ and Continuity Jan 29 answered Pythagorean Theorem Proof Without Words (request for words)