Jan Valdman
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Associate professor of applied mathematics https://sites.google.com/site/janvaldman/ Professional Interests: FEM, nonlinear computational mechanics, a posteriori error estimates, MATLAB vectorizations
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Gesendet
Path-following method for algebraic inclusions
Implementation of the semismooth* method.
etwa 2 Monate vor | 0 Downloads |
Gelöst
Sum of series I
What is the sum of the following sequence: Σ(2k-1) for k=1...n for different n?
4 Monate vor
Gelöst
Counting in Finnish
Sort a vector of single digit whole numbers alphabetically by their name, in Finnish. See the Wikipedia page for <http://en.wik...
4 Monate vor
Gelöst
Doubling elements in a vector
Given the vector A, return B in which all numbers in A are doubling. So for: A = [ 1 5 8 ] then B = [ 1 1 5 ...
4 Monate vor
Gelöst
Calculate area of sector
A=function(r,seta) r is radius of sector, seta is angle of sector, and A is its area. Area of sector A is defined as 0.5*(r^2...
4 Monate vor
Gesendet
Equilibria of economical models with cost of change
Evaluations of Cournot-Nash and Stackelber-Cournot-Nash equilibria for models with several firms using Gauss method
etwa ein Jahr vor | 3 Downloads |
Gesendet
Evaluation of intrinsic rotations
We provide an alternative to the function rotm2eul from Robotics System Toolbox and comparisons.
mehr als ein Jahr vor | 2 Downloads |
Gesendet
HADAMARD’S INEQUALITY IN THE MEAN
Evaluation of the HADAMARD’S INEQUALITY IN THE MEAN in 2 space-dimensions.
mehr als ein Jahr vor | 1 Download |
Gesendet
Enlarge figure axes by a given factor
Given a figure with (eg. tight) axes, this simple code automatically recalculates and enlarges axes them by a prescribed factor....
etwa 2 Jahre vor | 1 Download |
Gesendet
Constitutive model of shape memory alloys
An unconstrained minimization of FEM discretized energies.
etwa 2 Jahre vor | 3 Downloads |
Frage
quasi-Newton method with initial Hessian + preconditioning
I am heavily dependent on the quasi-Newton method in the minimization of nonlinear energies f(x)-> min discretized by the fi...
etwa 2 Jahre vor | 1 Antwort | 0
1
AntwortGesendet
Semismooth* Newton method for contact friction problems
Finite element solution of a contact problem with a Tresca friction by the semismooth* Newton method.
mehr als 3 Jahre vor | 1 Download |
Gelöst
Get all prime factors
List the prime factors for the input number, in decreasing order. List each factor. If the prime factor occurs twice, list it as...
fast 4 Jahre vor
Frage
A fast cell array generation
Dear all, in our optimization procedure, we need to create a cell array 'v_indices' from a vector 'v' and another cell array of...
etwa 4 Jahre vor | 1 Antwort | 0
1
AntwortGelöst
Swap the first and last columns
Flip the outermost columns of matrix A, so that the first column becomes the last and the last column becomes the first. All oth...
etwa 4 Jahre vor
Gelöst
Swap the input arguments
Write a two-input, two-output function that swaps its two input arguments. For example: [q,r] = swap(5,10) returns q = ...
etwa 4 Jahre vor
Gelöst
Reverse the vector
Reverse the vector elements. Example: Input x = [1,2,3,4,5,6,7,8,9] Output y = [9,8,7,6,5,4,3,2,1]
etwa 4 Jahre vor
Gelöst
Length of the hypotenuse
Given short sides of lengths a and b, calculate the length c of the hypotenuse of the right-angled triangle. <<https://i.imgu...
etwa 4 Jahre vor
Gelöst
Generate a vector like 1,2,2,3,3,3,4,4,4,4
Generate a vector like 1,2,2,3,3,3,4,4,4,4 So if n = 3, then return [1 2 2 3 3 3] And if n = 5, then return [1 2 2...
etwa 4 Jahre vor
Gelöst
Maximum value in a matrix
Find the maximum value in the given matrix. For example, if A = [1 2 3; 4 7 8; 0 9 1]; then the answer is 9.
etwa 4 Jahre vor
Gelöst
Side of a rhombus
If a rhombus has diagonals of length x and x+1, then what is the length of its side, y? <<https://imgur.com/x6hT6mm.png>> ...
etwa 4 Jahre vor
Gelöst
Fibonacci sequence
Calculate the nth Fibonacci number. Given n, return f where f = fib(n) and f(1) = 1, f(2) = 1, f(3) = 2, ... Examples: Inpu...
mehr als 4 Jahre vor
Gelöst
Binary numbers
Given a positive, scalar integer n, create a (2^n)-by-n double-precision matrix containing the binary numbers from 0 through 2^n...
mehr als 4 Jahre vor
Gelöst
Column Removal
Remove the nth column from input matrix A and return the resulting matrix in output B. So if A = [1 2 3; 4 5 6]; ...
mehr als 4 Jahre vor
Gelöst
Length of a short side
Calculate the length of the short side, a, of a right-angled triangle with hypotenuse of length c, and other short side of lengt...
mehr als 4 Jahre vor
Gelöst
Return the 3n+1 sequence for n
A Collatz sequence is the sequence where, for a given number n, the next number in the sequence is either n/2 if the number is e...
fast 5 Jahre vor
Minimization of a function with unknown gradient but known sparsity pattern of its hessian
Dear colleague, based on our discussions from yesterday, I implemented a finite difference scheme for a gradient approximation ...
etwa 5 Jahre vor | 0
Frage
Minimization of a function with unknown gradient but known sparsity pattern of its hessian
Dear colleagues, is there a fmincon option to minimize a function without the knowledge of its gradient but providing a sparsit...
etwa 5 Jahre vor | 2 Antworten | 1