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The word function has a sort of precis mening in math as a rule mapping each NUMBER in some domain to some NUMBER in a codomaon. The word arrow however can refe
by tobbe2064 10y ago
The word function has a sort of precis mening in math as a rule mapping each NUMBER in some domain to some NUMBER in a codomaon. The word arrow however can refer to any directed relation including less than or divides or what not, as long as they are composable and associative
- tobbe2064 10y agoFurther math is sort of a stone age technology
- jonsterling 10y agowtf are you on about? That is not how math works.
- deleted 10y ago[deleted]
- tobbe2064 10y agoI apologise for my drunken and incorrect silliness. Aside from that, would you please enlighten as to what you meant by "that's not how math works"?
- jonsterling 10y agoSorry for my harsh comment; here's what I'm thinking of... In math, you are dealing with many different kinds of object, not just numbers. In fact, one of the big realizations that led to modern mathematics is that not all mathematical objects can even be coded as numbers! Your remark about "arrow" being more general than function is correct; but functions do not map only between sets of numbers, but between arbitrary sets, some of which contain elements that are not numbers, or even encodable as such.
- GFK_of_xmaspast 10y agoBronze age, sure, but stone age might be pushing it.
- startling 10y agoThat's not even true. Functions can map between lots of things, not necessarily numbers.