Difference between revisions of "Talk:Aufgaben:Problem 10"
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[[User:Carl|Carl]] ([[User talk:Carl|talk]]) 14:01, 18 June 2015 (CEST) | [[User:Carl|Carl]] ([[User talk:Carl|talk]]) 14:01, 18 June 2015 (CEST) | ||
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| + | I do not see a problem, what do you mean by disordered sum, where? He starts with dw(..k+1,k..) and gets back -dw(..k,k+1..), doesn't he? And this generalises to every permutation. | ||
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| + | [[User:Mario|Mario]] ([[User talk:Mario|talk]]) 18:35, 30 June 2015 (CEST) | ||
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Typos in a)? | Typos in a)? | ||
| − | I'm not too confident with this subject so I won't change nothing but in the prop from page 77 the summation index should run up to n instead of p. Further I think we should continue to label the V_j: ... | + | I'm not too confident with this subject so I won't change nothing but in the prop from page 77 the summation index should run up to n instead of p. Further I think we should continue to label the V_j: ... \(V_j(x^{j_i})\) ... |
Thanks for the nice solution | Thanks for the nice solution | ||
[[User:Mario|Mario]] ([[User talk:Mario|talk]]) 15:55, 30 June 2015 (CEST) | [[User:Mario|Mario]] ([[User talk:Mario|talk]]) 15:55, 30 June 2015 (CEST) | ||
| − | I think your right on both, although you probably mean: \(V_i(x^{j_i})\) | + | I think your right on both, although you probably mean: \(V_i(x^{j_i})\) --> yepp, thats what I meant. |
[[User:Carl|Carl]] ([[User talk:Carl|talk]]) 16:24, 30 June 2015 (CEST) | [[User:Carl|Carl]] ([[User talk:Carl|talk]]) 16:24, 30 June 2015 (CEST) | ||
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| + | Another point. Unused as I am, it took me quite a while to get the meaning of what you mean by V(gX) in your warning, (or X1(gX2) respectively for the commutator). Maybe one could make a explanationary note that (as in other cases where you did explicitly note it) here X is not a vectorfield anymore but a function X(f) as the argument was omitted. Am I right? Well I just see that it is actually written in the task itself when defining [,].. | ||
| + | [[User:Mario|Mario]] ([[User talk:Mario|talk]]) 18:35, 30 June 2015 (CEST) | ||
Revision as of 16:35, 30 June 2015
I don't think the proof for asymmitry was sufficient, it was only shown that we can pull out a minus sign from every sum, but the sum are disordered after the permutation and have be put back together. to show that we get back \(-d\omega\) and not something different
Carl (talk) 14:01, 18 June 2015 (CEST)
I do not see a problem, what do you mean by disordered sum, where? He starts with dw(..k+1,k..) and gets back -dw(..k,k+1..), doesn't he? And this generalises to every permutation.
Mario (talk) 18:35, 30 June 2015 (CEST)
Typos in a)?
I'm not too confident with this subject so I won't change nothing but in the prop from page 77 the summation index should run up to n instead of p. Further I think we should continue to label the V_j: ... \(V_j(x^{j_i})\) ... Thanks for the nice solution
Mario (talk) 15:55, 30 June 2015 (CEST)
I think your right on both, although you probably mean: \(V_i(x^{j_i})\) --> yepp, thats what I meant.
Carl (talk) 16:24, 30 June 2015 (CEST)
Another point. Unused as I am, it took me quite a while to get the meaning of what you mean by V(gX) in your warning, (or X1(gX2) respectively for the commutator). Maybe one could make a explanationary note that (as in other cases where you did explicitly note it) here X is not a vectorfield anymore but a function X(f) as the argument was omitted. Am I right? Well I just see that it is actually written in the task itself when defining [,]..
Mario (talk) 18:35, 30 June 2015 (CEST)
