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Activity for Incnis Mrsi‭

Type On... Excerpt Status Date
Comment Post #280716 Matrix multiplication is a ring operation only for square (*n*×*n*) matrices. The cross product isn’t a ring operation at all (unless your *rings* subsume so named non-associative rings).
(more)
almost 3 years ago
Comment Post #280910 Did @Adam‭ intend “|*ab*|π” for the numerator?
(more)
almost 3 years ago
Edit Post #281203 Post edited:
grammar tweaks
almost 3 years ago
Edit Post #281203 Post edited:
{0} must be closed in $K$
almost 3 years ago
Edit Post #281203 Post edited:
$K$ isn’t an ordered field!
almost 3 years ago
Edit Post #281203 Initial revision almost 3 years ago
Answer A: Is this topology basis dependent?
First of all, the kernel of any $\phi\in V^\ast$ has codimension at most one; more precisely, $\ker\phi = V \Leftrightarrow \phi = 0$ and $\operatorname{codim}\ker\phi = 1$ if equalities are false. Hence $V^{[\ast]} = V^\ast$. Ī̲ suspect that by $V^{[\ast]}$ you really assume a basis-dependent thing,...
(more)
almost 3 years ago