Flavius
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 Apr16 awarded Popular Question Oct10 accepted Proof of $(A \cap B) \cup (B \cap C) \cup (C \cap A) = (A \cup B) \cap (B \cup C) \cap (C \cup A)$ Oct9 comment Proof of $(A \cap B) \cup (B \cap C) \cup (C \cap A) = (A \cup B) \cap (B \cup C) \cap (C \cup A)$ I don't get what you mean with the first method, and I have used the two properties in the "another method" you have suggested, and I got stuck at the step I have mentioned in the question. Please enlighten me. Oct9 revised Proof of $(A \cap B) \cup (B \cap C) \cup (C \cap A) = (A \cup B) \cap (B \cup C) \cap (C \cup A)$ added 45 characters in body Oct9 asked Proof of $(A \cap B) \cup (B \cap C) \cup (C \cap A) = (A \cup B) \cap (B \cup C) \cap (C \cup A)$ Jul2 awarded Curious Jun25 accepted Getting a feel for the transformation A on vector x which lies outside of any eigenspace Jan22 accepted Orthogonal matrix Q of A such that $Q^T A Q$ is a diagonal matrix Jan22 asked Orthogonal matrix Q of A such that $Q^T A Q$ is a diagonal matrix Jan22 comment Calculating Diagonal Matrix, too many zeroes in the eigen vectors, what now? I see, accepted! Jan22 accepted Calculating Diagonal Matrix, too many zeroes in the eigen vectors, what now? Jan22 comment Calculating Diagonal Matrix, too many zeroes in the eigen vectors, what now? I was afraid of that for the same reason, however I have to calculate the jacobi iteration starting at $0$, and I see in the lecture they've found out the diagonal matrix $$D = \left(\begin{matrix} 1 & 0 & 0 \\ 0 & 2 & 0 \\ 0 & 0 & 1 \end{matrix}\right)$$ Jan22 asked Calculating Diagonal Matrix, too many zeroes in the eigen vectors, what now? Jan21 accepted How would you model subjective opinions like “how fast time passes”? Jan21 comment How would you model subjective opinions like “how fast time passes”? Ok, and then? Let's assume I've established that my assumption was completely right (for the sake of simplicity), then how do I predict how a student would react to a given tuple $(T,D,O,I,M)$? I'm interesting in saying "Student X will say that this was [0,1] hard". Jan21 asked How would you model subjective opinions like “how fast time passes”? Jan16 awarded Critic Jan15 revised Getting a feel for the transformation A on vector x which lies outside of any eigenspace added 127 characters in body Jan15 asked Getting a feel for the transformation A on vector x which lies outside of any eigenspace Jan6 revised Eigenvector of A to given Eigenvalue which requires row swapping to get reduced echelon form added 71 characters in body