4. (15 points) Prove or disprove each one of the following statements: ·0(f(n) + g(n)) =...
Let f(n) and g(n) be asymptotically positive functions. Prove or disprove each of the following conjectures. f(n) = O(g(n)) implies g(n) = Ω(f(n)) . f(n) = O(g(n)) implies g(n) = O(f(n)). f(n) + g(n) = Θ(min(f(n),g(n))).
disprove the following statements (if it is true, please write a proof 1: (15 Points) Prove or or quote the corresponding theorem from the textbook; if it is false, please provide a counter example to disprove If u is orthogonal to all the vectors 1, U2,,n then u is orthogonal to all the vectors in Span({, ,., )
Prove or disprove the following: If f(n) =O(g(n)) then nf(n) = O(ng(n))
Prove (using the definition of O) or disprove (via counter-example): If f(n) = O(n)), and g(n) = O(n2), then f(n) + g(n) = O(n5). Prove (using the definition of O) or disprove (via counter-example): If f(n) = O(n), and g(n) = O(n2), then fin)/g(n) = O(n).
4. Let fín) and g(n) be asymptotically positive functions. Prove each of the following statements A. fin)-O(g(n)) if and only if fin) *gn)g(n)) B. fn) - Og(n if and only if fin)2- O(g(n)?) 4. Let fín) and g(n) be asymptotically positive functions. Prove each of the following statements A. fin)-O(g(n)) if and only if fin) *gn)g(n)) B. fn) - Og(n if and only if fin)2- O(g(n)?)
Part I. (30 pts) (10 pts) Let fin) and g(n) be asymptotically positive functions. Prove or disprove each of the following statements T a、 f(n) + g(n)=0(max(f(n), g(n))) 1. b. f(n) = 0(g(n)) implies g(n) = Ω(f(n)) T rc. f(n)- o F d. f(n) o(f(n)) 0(f (n)) f(n)=6((f(n))2)
Prove or disprove the following statements. In each case, A and B are both nx n matrices. (a) If C is a 3 x 2 matrix, then C has a left inverse. (b) If Null(AT) = {Õ}, then A is invertible. (c) If A and B are invertible matrices, then A + B is invertible.
disprove that the given lan 4. [20 Points For each of the following languages, prove or guage is regular (a) L1www e {a,b}*} {w w E {a, b}* and no two b's in w have odd number of a's in between}. (b) L2 (c) L3 a" (d) L4 vw n = 3k, for k > 0}. a, b}*} disprove that the given lan 4. [20 Points For each of the following languages, prove or guage is regular (a) L1www e...
Topology 3. Either prove or disprove each of the following statements: (a) If d and p map (X, d) X, then the identity topologically equivalent metrics (X, p) and its inverse are both continuous are two on (b) Any totally bounded metric space is compact. (c) The open interval (-r/2, n/2) is homeomorphic to R (d) If X and Y are homeomorphic metric spaces, then X is complete if and only if Y is complete (e) Let X and Y...
4. Assume that A, B E Mnxn(R). Prove or disprove each of the following statements. (a) If AB is a product of elementary matrices, then A is a product of elementary matrices. (b) If R is the RREF of A, then det A = det R. (c) If det A-det B, then A = B.