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Are Mjaavatten


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516 2015 年以降の合計貢献数

Retired physicist with background in the petroleum and process industry. My main interests are mathematical modelling, numerical methods, and thermodynamics.

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Set the Euler-Mascheroni constant with an identity using available MATLAB functions
Cody Problem <https://www.mathworks.com/matlabcentral/cody/problems/42826 42826> asked us to estimate the <https://en.wikipedia....

3日 前

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Solve an ODE: diffusion problem 2

4日 前

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Solve an ODE: separable equation

6日 前

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Solve an ODE: equation A

7日 前

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Calculate Euler's phi function
Compute the Euler's phi function of a large integer. For more information about this topic please visit: <https://en.wikiped...

8日 前

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Sum of all the divisors of n

8日 前

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Highest building

14日 前

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Add 100

14日 前

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Pentagonal Numbers
Your function will receive a lower and upper bound. It should return all pentagonal numbers within that inclusive range in ascen...

14日 前

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Last non-zero digit
Given a number n, find the last non-zero digit of the factorial of that number. You need to take care of the large values of n....

15日 前

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Champernowne Constant
The <http://en.wikipedia.org/wiki/Champernowne_constant Champernowne constant> is a real number whose digits in decimal represen...

15日 前

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Is it an Armstrong number?
An Armstrong number of three digits is an integer such that the sum of the cubes of its digits is equal to the number itself. Fo...

17日 前

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Lychrel Number Test (Inspired by Project Euler Problem 55)
The task for this problem is to create a function that takes a number _n_ and tests if it might be a Lychrel number. This is, re...

17日 前

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Ordinal numbers
Given an integer n, return the corresponding ordinal number as a character string. For example, ord(1)='1st' ord(2)=...

17日 前

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Determine if input is a perfect number
A <http://en.wikipedia.org/wiki/Perfect_number/ perfect number> occurs whent the sum of all divisors of a positive integer, exce...

17日 前

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Determine if input is a Narcissistic number
<http://en.wikipedia.org/wiki/Narcissistic_number Narcissistic number> is a number that is the sum of its own digits each raised...

17日 前

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Fangs of pseudo-vampire number
given a number, find all the fangs of that number. A pseudo-vampire number can have multiple of fangs. The output should be a...

17日 前

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Kaprekar numbers
Test if the input is a Kaprekar number: <http://mathworld.wolfram.com/KaprekarNumber.html>. Return a logical true or false. ...

19日 前

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Parasitic numbers
Test whether the first input x is an n-parasitic number: <http://en.wikipedia.org/wiki/Parasitic_number>. ( _n_ is the second in...

19日 前

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Woodall number
Test whether the input is a Woodall number: <http://en.wikipedia.org/wiki/Woodall_number> _Please do not cheat by simply chec...

19日 前

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Find all vampire fangs
A <http://en.wikipedia.org/wiki/Vampire_number vampire number> is a number v that is the product of two numbers x and y such th...

19日 前

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Fangs of a vampire number
A <http://en.wikipedia.org/wiki/Vampire_number vampire number> is a number v that is the product of two numbers x and y such tha...

20日 前

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Find vampire numbers
A <http://en.wikipedia.org/wiki/Vampire_number vampire number> is a number v that is the product of two numbers x and y such th...

20日 前

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generate nth pentatope number
https://en.wikipedia.org/wiki/Pentatope_number

21日 前

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check whether a number is a pentatope number
<https://oeis.org/A000332>

21日 前

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Cantor counting
Find the nth cantor's rational number. the sequence is given below in the link. Sequence: 1/1,1/2,2/1,3/1,2/2,1/3,1/4... ... .....

21日 前

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find nth even fibonacci number
1st even fibonacci number=2 ; 2nd even fibonacci number=8 ..

22日 前

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