Ilya
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 May10 comment Transformation between 2D coordinate systems So I'd start by translating by (-3,-3), or what? May10 comment Transformation between 2D coordinate systems What if #1 coordinates were at (3,3)? Oct31 comment Projection linear transformation: explain the wording Please explain. What do you mean by "projected to 1"? The operator is $T:R^2\to R^2$ so it should project into $R^2$, shouldn't it? Jan28 comment Does little-o notation imply going into infinity? Thanks! This helps. Jan28 comment Does little-o notation imply going into infinity? What I meant is that not only f(n) >= g(n) for some n, but f(n)=M so that g(n)<=M and g(x)<=M for all x. Jan28 comment Does little-o notation imply going into infinity? I've updated the question. I hope I'm not too confused. Jan28 comment Does little-o notation imply going into infinity? Whoops, I mixed up f and g :) Mar11 comment Proving that a formula cannot be proven (has no formal proof) in a given deduction system What does "different semantics" mean for, say, the Hilbert system? For example, will redefining $\to$ to have a different truth table mean "different semantics"? Mar6 comment In modal logic, is $\lnot\square P\equiv\lozenge\lnot P$? Yes, $\square P \equiv \neg \lozenge \neg P$ -- which also leads me towards trusting my conclusion. Sep24 comment Change of Basis Confusion Ok, this has been the clearest, most direct and to-the-point explanation. Thanks!