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seen Mar 11 at 18:19

Feb
6
comment Math notation for summing up the rows in a matrix
Thanks. Seems that this is the 'standard' way then...
Dec
1
awarded  Tumbleweed
Nov
24
revised Modelling a continuous cost function of time in terms of other functions
added 110 characters in body
Nov
24
revised Modelling a continuous cost function of time in terms of other functions
edited title
Nov
24
asked Modelling a continuous cost function of time in terms of other functions
Nov
21
accepted Function with a continuous domain but a discrete range
Nov
21
comment Function with a continuous domain but a discrete range
So in my case, am I correct to say that it is not a continuous function? And the definition of it can still be: $lights: \Bbb R_{\geq0} \rightarrow \{0,1\}$
Nov
21
comment Function with a continuous domain but a discrete range
Yes, its those kinds of issues I am asking about. In the example I gave, if the function was $lights(t)$, $t$ is definitely a continuous value, but at the same time the result is just 0 or 1. So is it a continuous function or not? Or does it have a specific name? And how is it defined (do you put $lim$ etc.)?
Nov
21
comment Function with a continuous domain but a discrete range
Yes, what I mean is, does it have a specific name? Is it defined in a specific way? It is not a continuous function, so I don't think it is defined using limits, or is it?
Nov
21
asked Function with a continuous domain but a discrete range
Nov
21
comment What would be the right domain for a function that takes time as a parameter?
Yes precisely what I am trying to model. Thanks
Nov
21
accepted What would be the right domain for a function that takes time as a parameter?
Nov
20
comment What would be the right domain for a function that takes time as a parameter?
Yes, no need for complex numbers. I just wanted to know what is the most common way people use to represent a normal timeline
Nov
20
comment What would be the right domain for a function that takes time as a parameter?
So is it defined as something like $T$ and specified that $T \subset R$? Or is there a specific standard symbol?
Nov
20
asked What would be the right domain for a function that takes time as a parameter?
Oct
17
accepted Math notation for summing up the rows in a matrix
Oct
17
comment Math notation for summing up the rows in a matrix
Thanks, $1^T\phi$ and separately specifying that $1$ is a vector of (1,1, ..., 1) seems acceptable.
Oct
17
comment Math notation for summing up the rows in a matrix
Thanks. I was wondering whether there was some notation for this, because it seems like something people use often.
Oct
17
asked Math notation for summing up the rows in a matrix
Aug
14
comment Definition of a function's domain and co-domain with subscript in name
OK, yes I actually thought about it again and left it out. Since you said it makes sense I just included the subscript with the variable (which is defined earlier). Thanks again.