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 Jul2 awarded Curious Nov17 accepted How can I make a function out of this graph? Nov14 asked How can I make a function out of this graph? Jun27 accepted Need helping solving this reflexive, symmetric, and transitive closure question Jun27 asked Need helping solving this reflexive, symmetric, and transitive closure question Jun27 accepted Are these combinations and permutations correct? Jun27 asked Are these combinations and permutations correct? Apr22 accepted Proof of identity $F_m F_n + F_{m−1} F_{n−1} = F_{m+n−1}$ for Fibonacci numbers Apr22 comment Proof of identity $F_m F_n + F_{m−1} F_{n−1} = F_{m+n−1}$ for Fibonacci numbers Unfortunately that is all they say, nothing about A, except for this extra statement which I don't think is related to A: The Fibonacci numbers are given by the formula F1 = F2 = 1 and for n ≥ 3. We also deﬁne F0 = 0. Fn = Fn−1 + Fn−2. Apr22 asked Proof of identity $F_m F_n + F_{m−1} F_{n−1} = F_{m+n−1}$ for Fibonacci numbers Apr3 comment Prove that if rkAB = n then rkA = rkB = n This is a good one that I just thought of as well! I'm welcome to more as well. Apr3 revised Prove that if rkAB = n then rkA = rkB = n added 11 characters in body Apr3 asked Prove that if rkAB = n then rkA = rkB = n Mar25 accepted Determining Rank and Nullity Mar25 comment Determining Rank and Nullity Ok, last question, how did you know the rank of L depends on R7 not M(4,3)? Mar25 awarded Commentator Mar25 comment Determining Rank and Nullity I thought the dimension of a matrix is the number of leading 1s in the row reduced form? Mar25 comment Determining Rank and Nullity How did you know that the rank(L) is the codomain (range) of L? Not the domain? And how is dim M(4,3) 28? Mar25 asked Determining Rank and Nullity Mar22 comment Is it possible for these to be onto? I apologize if I sounded rude, that was not my intent. As far as what F(R) is, this problem I posted comes straight from my book, I suppose it assumes you should already know what F(R) is like you know what R4 and P5 are..