mathwonk's latest activity
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Mmathwonk replied to the thread Topology Introductory Topology online textbook recommendations.continuity = topology. study the first topological result in calculus, the intermediate value theorem, and think about its proof...
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Mmathwonk replied to the thread Mystery noise in flue (no, it's not a critter).at our house the northern flickers sound exactly like that.
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Mmathwonk replied to the thread I Compact manifold cannot be represented by (single) parametric equation.actually the parametric mapping t-->e^it represents the compact manifold S^1 rather well.
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Mmathwonk reacted to martinbn's post in the thread I Trouble understanding an online solution to an exercise in Dummit & Foote with
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Prime ideals of ##\mathbb Z[x_1,x_2,\dots]/(x_1x_2,x_3x_4,\dots)## correspond to prime ideals of ##\mathbb Z[x_1,x_2,\dots]## containing... -
Mmathwonk replied to the thread I Trouble with a passage in Zariski & Samuel's Commutative algebra text.I suggest you go back and read, and think about, my post #6 in your earlier thread...
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Mmathwonk replied to the thread I Make a list of all irreducible polynomials of degrees 1 to 5 over F2.This seems a little easier than the book's hints make it. A poly. over Z/2 is divisible by X or X+1 iff it either ends in X or has an...