Questions tagged [functions]
Questions about the use of built-in Mathematica functions, including pure functions.
3,870
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Numerator function doesn't work [closed]
s=E^(-t)/Sqrt[2]
Numerator[s]
The result is 1, rather than E^(-t) as I expect.
How to get E^(-t)?
- 33
0
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1
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48
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Transforming symbolic expression to a function
I have the following symbolic expression:
ZZ = \[Delta] + 4*\[Pi]*Z - log[\[Delta]]
I'm trying to define a new function ...
- 219
2
votes
1
answer
167
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JordanDecomposition gives out different answers on symbolic and numerical calculations
Numerical substitution before or after performing the JordanDecomposition yields different results.
Here is the source code to reproduce the error:
...
- 41
2
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3
answers
200
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Trouble with branch cuts plotting a real function
When I plot the following function
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3
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1
answer
76
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Replacing d[r]/dt by 0 in expression
The purpose is to recognize d[r]/dt in the expression below, and to make the expression zero. It seems impossible because there is no Time[Power[dt,-1],d[r]] in the expression at the left hand side in ...
- 734
9
votes
2
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117
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How can I return an empty list from FunctionCompile?
The following code is for solving a linear congruence of the form $ax=b \; (\mathrm{mod}\ m)$ using FunctionCompile.
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- 187
1
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3
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How to only evaluate this function in the new variables after the derivative has been taken?
I have the following situation. I will first post the code and then explain what I'm trying to do and what is going wrong
...
- 583
5
votes
6
answers
672
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How to efficiently select elements with the minimum value from a large list?
How can I efficiently select sublists with the minimum value of the third elmement from the following list?
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1
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91
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Properties of the Function f ( x ) = x − { x } : A Mathematical Analysis
Given the definition: If $m-\frac{1}{2}<x≤m+\frac{1}{2}$ (where m is an integer), then m is called the nearest integer to the real number x, denoted as {x}, that is, {x}=m. Among the following four ...
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88
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Problem with Length command
I am using the Length[] for counting number of additive terms. It works fine but when I have the following type of terms
...
- 377
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0
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62
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Double Variable Function
Suppose we have a function let's say F(w, T) with w and T taking values from the lists T_list=[...], w_list[...] respectively. I want to calculate F(w, T) for EACH value of T in the T_list while w ...
0
votes
1
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60
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Computing an exact range with FunctionRange
When using FunctionRange to compute the range of the two-argument ArcTan function, Mathematica fails to return an exact answer.
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- 536
5
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163
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Hypergeometric Function Integration Using Mellin-Barnes Representation
I have the following integral:
$$
I=\int_0^1 d \alpha d \beta d \gamma r(\gamma) s(\alpha, \beta) T(\alpha, \beta, \gamma)
$$
where I define
$$r(\gamma)=(\gamma(1-\gamma))^{ -1 / 2+\epsilon / 2}$$
and,...
- 139
3
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0
answers
61
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Return and Function [duplicate]
Can somebody explain the behavior of Return inside a function? I know that Function and If ...
- 55.7k
2
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2
answers
61
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How to implement a Lie bracket in Mathematica by specifying its properties and action on generators?
I want to implement a Lie bracket operation in Mathematica and don't know exactly how to do it. What I want is something like:
I prescribe a set of generators L[m]
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- 583