# Jan Valdman

Last seen: 7日 前 2010 年からアクティブ

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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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#### Feeds

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

8ヶ月 前 | ダウンロード 2 件 |

Evaluation of intrinsic rotations
We provide an alternative to the function rotm2eul from Robotics System Toolbox and comparisons.

10ヶ月 前 | ダウンロード 2 件 |

Evaluation of the HADAMARD’S INEQUALITY IN THE MEAN in 2 space-dimensions.

12ヶ月 前 | ダウンロード 2 件 |

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....

1年以上 前 | ダウンロード 1 件 |

Constitutive model of shape memory alloys
An unconstrained minimization of FEM discretized energies.

1年以上 前 | ダウンロード 10 件 |

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 ...

1年以上 前

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...

1年以上 前 | 1 件の回答 | 0

### 1

Semismooth* Newton method for contact friction problems
Finite element solution of a contact problem with a Tresca friction by the semismooth* Newton method.

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...

3年以上 前

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...

3年以上 前 | 1 件の回答 | 0

### 1

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...

3年以上 前

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 = ...

3年以上 前

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]

3年以上 前

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...

3年以上 前

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...

3年以上 前

Return area of square
Side of square=input=a Area=output=b

3年以上 前

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.

3年以上 前

Given a and b, return the sum a+b in c.

3年以上 前

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>> ...

3年以上 前

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...

3年以上 前

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...

3年以上 前

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]; ...

3年以上 前

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...

3年以上 前

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...

4年以上 前

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 ...

4年以上 前 | 0

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...

4年以上 前 | 2 件の回答 | 1

### 2

Simulation of von Kármán viscoelastic plates
A quasistatic evolution of viscoelastic von Kármán plates.

4年以上 前 | ダウンロード 3 件 |

Pascal's Triangle
Given an integer n >= 0, generate the length n+1 row vector representing the n-th row of <http://en.wikipedia.org/wiki/Pascals_t...

4年以上 前

Find the sum of all the numbers of the input vector
Find the sum of all the numbers of the input vector x. Examples: Input x = [1 2 3 5] Output y is 11 Input x ...

4年以上 前

Determine if input is odd
Given the input n, return true if n is odd or false if n is even.

4年以上 前