# Questions tagged [wolfram-alpha]

For mathematical questions related to the usage of Wolfram Alpha.

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### On multivariable functions and graphs

The definition of graph from Wikipedia is the following: In mathematics, the graph of a function f is, formally, the set of all ordered pairs $(x, f(x))$, and, in practice, the graphical ...
33 views

### How does one test whether a positive integer is semiperfect in Wolfram Alpha?

Wolfram Alpha allows to test whether a positive integer $n$ is abundant, deficient or perfect. However, I was not able to find a way to test whether $n$ is semiperfect (i.e., equal to the sum of all ...
34 views

### How to plot all points that are defined by $(4\kappa+2(\lambda \mod 2), 2\lambda\sqrt 3)$ in Wolfram Alpha?

How to plot all points that are defined by $(4\kappa+2(\lambda\mod2), \ 2\lambda\sqrt 3)$ for some $\kappa$ and $\lambda$ that are integers in Wolfram Alpha? I just want to know what this set of ...
106 views

### What is this strange notation in the output of Wolfram Alpha?

For some reason I need to find the values of two positive integers $k$ and $x$ such that: $$k x^3 (2 x + 1)^3>2 (k + 1) (x + 1)^2 (2 x^4 + 2 x^3 + 3 x^2 + 2 x + 1).$$ Inputting this in Wolfram ...
56 views

### What is meant by DiracDelta'[t]?

While calculating an inverse Laplace transform Wolfram Alpha returned to me the following output: ...
57 views

### How to calculate this sum with binomials?

In this paper An Improved Algorithm for Decentralized Extrema-Finding in Circular Configurations of Processes from 1979, in chapter with analyze of average number of passes messages I found this ...
60 views

### What is happening here? [Wolfram]

When I input: $2^{a/b} = (2^a)^{1/b}$ Into Wolfram Alpha, it produces a very strange looking "implicit plot": I'm entirely sure what this means or what it's even trying to plot and how. I suspect ...