Community Profile

# Thomas

### self employed

18 total contributions since 2019

#### Thomas's Badges

View details...

Contributions in
View by

Submitted

two ways to compute Riemanns prime counting function
one version which works (J2) and one which does not work (J1).

19 days ago | 0 downloads |

Question

Cannot start Matlab - getting error "std::exception: Loading D:\Program Files\MATLAB\R2019b\bin\win64\matlab_startup_plugins\Imgrimpl\lib
When I start Matlab from the Desktop Icon or from the task bar, I get this error: "std::exception: Loading D:\Program Files\M...

2 months ago | 0 answers | 0

### 0

answers

Submitted

convert integer to binary or binary to integer
convert a column vetor of integers to a column vector of binaries or vice versa

3 months ago | 2 downloads |

Submitted

find zeros of the Riemann zeta function
This function finds zeros of the Riemann zeta function on the critical line 0.5 + i*t in an interval von <= t <= bis

4 months ago | 1 download |

Submitted

zetaRS approximates Riemann's zeta(0.5 + i*t) for large t
Fast computation of Riemann's zeta function on the critical strip using the Riemann Siegel formula.

4 months ago | 2 downloads |

Question

using fzero with arrayfun searching for zeros inside an interval
I have a function f = @(x) -x.^2+4 with a zero at -2 and +2 using fzero(f, [-3, 1.9]) I get the (correct) zero inside the inte...

4 months ago | 1 answer | 0

### 1

answer

Submitted

Fast approximation of Pi
Approximate Pi with 16th order convergence

5 months ago | 1 download |

Submitted

Create and run Turing machines
Some tools and examples for creating and simulating Turing machines and macro-Turing machines.

5 months ago | 1 download |

Submitted

Computation of the rado function
More sophisticated check for endless loops, support for parallel execution and the use of macro-Turing-machines

9 months ago | 1 download |

Submitted

uncover the call structure of a recursive function call
recurse(tree) helps to uncover the call structure of a recursive function call.

9 months ago | 1 download |

Submitted

GaussLegendre
quick approximation of pi using the Gauss-Legendre algorithm

10 months ago | 1 download |

Submitted

two versions of the Euler-phi function
two brief implementations of the Eulerphi function

10 months ago | 2 downloads |

Question

Extract lines of a three dimensional matrix using an array of indices and NO for-loop
I have a three dimensional 10x5x2 array. Example: r(:,:,1) = [1 0 2 1 1; 2 0 3 1 1; 3 0 4 1 1; 4 0 1 1 -1; 5 0 -1 1 1; 1 1 3 1...

1 year ago | 1 answer | 0

### 1

answer

Submitted

Computation of Rado-function
Recursive computation of the "uncomputable" Rado-function.

1 year ago | 1 download |

Submitted

Karatsuba algorithm for fast multiplication
Multiplication of "x" and "y" with Karatsuba method using base "base" x , y and base can be freely chosen

1 year ago | 1 download |

Submitted

Shor Algorithm for prime factoring
A Version of the Shor-Algorithm for prime Factoring. Please feel free to comment on it or recommend improvements.

1 year ago | 3 downloads |

Question

trying to compute Riemann's prime counting function J(x)
I am trying to compute Riemann's prime counting function J(x): J(x) should approximate the numbers of primes <= x using thi...

1 year ago | 2 answers | 0

### 2

answers

Question

isprime function seems to have poor performance
Why is MatLab's "isprime" function so much slower than Octave's "isprime" function? I am using MatLab's "isprime" function to c...

1 year ago | 2 answers | 2

answers