mathwonk's latest activity
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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
Like.
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...
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Mmathwonk replied to the thread I Localizing single variable quotient polynomial ring at a prime ideal.In reference to post #1, your description of the localization is technically correct but for me does not do much towards actually...
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Mmathwonk reacted to Hornbein's post in the thread Programming Jokes: Lame, Science & Math Jokes! with Like.
I saw this on a computer in 1967. As far as I can recall it was exactly the same.
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Mmathwonk reacted to Borg's post in the thread Programming Jokes: Lame, Science & Math Jokes! with Like.
Can't forget the classics.
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Mmathwonk reacted to fresh_42's post in the thread I Localising a non integral domain at a prime with Like.
As an add-on to what @mathwonk has said, you can always find lecture notes online. My proposal for search keys would be: "Introduction...
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Mmathwonk replied to the thread I Localising a non integral domain at a prime.aside: (preachy commentary, hopefully useful;) By the way, please forgive me, but from your questions, I have the impression you have...
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Mmathwonk reacted to martinbn's post in the thread I How do we distinguish two different notations for cokernel and coimage? with Like.
In that case why don't you study something else? Algebra can be a bit abstract an unmotivated. But if you study fist other parts...
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Mmathwonk replied to the thread I Localising a non integral domain at a prime.Note: a/1 ≈ 0/1 iff 3a = 0 in Z/6. Hence the kernel of the map Z/6-->S^-1(Z/6) is {0,2,4} and the image is {0/1, 1/1}. Hence every...
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Mmathwonk replied to the thread Calculus Marsden 1979 vs Marsden 6th edition.I guess he was considered a scientific publisher. Mike was apparently able, primarily from the sales of his Calculus book, to spend his...
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Mmathwonk replied to the thread Calculus Marsden 1979 vs Marsden 6th edition.as for my opinion of Thomas calculus, see my post #20 in this thread...
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Mmathwonk replied to the thread I How do we distinguish two different notations for cokernel and coimage?.Your post #17 brings up an important point I meant to mention sooner. namely, as fresh says, it is important to know what the maps are...
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Mmathwonk reacted to fresh_42's post in the thread I How do we distinguish two different notations for cokernel and coimage? with Like.
You have to look at the homomorphisms. How are they defined? How do they act on specific elements of the rings. Once you know this, you...