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Mathematica : Recent Questions and Answers (Page 114)

Find answers to your questions about Mathematica or help others by answering their Mathematica questions.

Boundary value problem with a DiracDelta

It seems that Mathematica can solve an initial value problem with a DiracDelta, but not a boundary value problem with a DiracDelta. Is there a workaround? Consider for example a...

Asked on 04/25/2021

3 answer

Change a list of x,y to a density function to analyze the distribution

So I have some (x,y) data from an oscilloscope. These numbers form a more or less gaussian shape. I am trying to extract the skewness of this shape, but the...

Asked on 04/25/2021

1 answer

How to compute matrices in Einstein notation:

I would like to compute $ r_{ii'} = sum_{kk'} A_{ii'}^{kk'} r_{kk'} $ where all indices vary from 0 to 1 to yield a vector / matrix....

Asked on 04/25/2021

1 answer

Equivalent of RadialOutside for Graph VertexLabels

I'm creating a circular graph and want the labels to be placed on the outside of the vertices in a circular manner on the outside of the graph. I've been...

Asked on 04/24/2021 by shellhead

4 answer

Inverse Laplace transform does not restore the original function

I take f[t_]:=Sqrt[t^2 - 1] HeavisideTheta[t - 1], apply LaplaceTransform[ t f[t], t, x], get BesselK[2, x]/x, apply InverseLaplaceTransform[ f[t], t, x]/x and get -(1/(2 x)) + x, which is...

Asked on 04/24/2021

0 answer

Riemann Prime Counting Function correction/pairing terms by Mathematica

Riemann Prime Counting Function: $$f(x)=operatorname{li}(x)-sum_rhooperatorname{li}(x^rho)-ln 2+int_x^infty frac{mathrm dt}{t(t^2-1)ln t}$$ The second correction/paring terms: $$sum_rhooperatorname{li}(x^rho)=sum_{I[rho]>0}[operatorname{Li}(x^rho)+operatorname{Li}(x^{1-rho})]$$ I tried to use Mathematica function LogIntegral to plot this second correction/paring terms, for...

Asked on 04/24/2021 by jasontower

1 answer

Optimal triangle (minimal area) surrounding a disk

Using RegionWithin it's quite easy to evaluate a parametric triangle with maximal area inside the disk(constant):dreieck = Triangle[{{x1, y1}, {x2, y2}, {x3, y3}}] (*parametric triangle*)sol = NMaximize[{Area[dreieck], RegionWithin[Disk[], dreieck]},Flatten[{{x1,...

Asked on 04/24/2021

1 answer

Adding some measurements into the plot

From Godbeer et al, Modelling proton tunnelling in the adenine–thymine base pair: ...

Asked on 04/24/2021 by Emre

2 answer

Seamless ContourPlot for a conditional function

When I try to create a ContourPlot of a continuous conditional function, Mathematica leaves a "seam" in between the two regions demarcated by the conditional. How do I fill this...

Asked on 04/24/2021

1 answer

Symbolic add of 32Bit Registers

I would like to perform multiple 32bit word register additions (mod 32 add. with variables of Boolean type shuffled with symbolic type). For this task I implemented a ripple adder...

Asked on 04/24/2021 by Bogdan Sofalca

0 answer

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