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I remember asking in freenode irc channel ##math that why matrix multiplication is defined like that, why not in any other way. I was told that: >> cuz the com
by smlckz 6y ago
I remember asking in freenode irc channel ##math that why matrix multiplication is defined like that, why not in any other way. I was told that:
>> cuz the composition of linear maps are defined like that.
It took a long time to understand what they meant. Still I see how it is taught to work out mechanically. Brave friends of mine went to the Wikipedia page to come back with more confusion. Wikipedia is a great reference when you know the subject well enough.
https://en.wikipedia.org/wiki/Wikipedia:WikiProject_Mathematics/Advice_on_using_Wikipedia_for_mathematics_self-study https://en.wikipedia.org/wiki/Wikipedia:WikiProject_Mathemat...
- exmadscientist 6y ago> Wikipedia is a great reference when you know the subject well enough. Some math pages on Wikipedia are great. Some are... horrid. A while back (2017?) I couldn't remember the terms in the Taylor expansion of sqrt(x), so I went to Wikipedia. The article was one of the most jumbled mishmashes I'd ever tried to read. But, even though I'm qualified to fix it, I didn't dare wade into Wikipedia politics. The rewrite would have taken a while (it's a long article), but I can't even imagine how long shoving it through would have taken!