Community Profile # Doddy Kastanya

Last seen: 11 jours ago Active since 2017

I love math and physics. Being a nuclear engineer keeps this alive.

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Is A the inverse of B?
Given a matrix A and a matrix B, is A the inverse of B? >>A=[2,4;3,5]; >>B=[-2.5,2;1.5,-1]; >>isInverse...

environ un mois ago

Solved

Rotate counterclockwise a matrix 90 deg with left-bottom element
Example: Input [ 1 2 3 4 5 6 ] Output [ 3 6 2 5 1 4 ]

6 mois ago

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Easy Sequences 2: Trigonometric function with integral input and output
The function 'F', defined as: , will always return an integer if the input is a natural number (in radian...

6 mois ago

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letter yes yes & letter no no
Split a string into two strings, wherein the first string has all alphabetic letters and the second string has all the remaining...

environ un an ago

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the fly, the train, the second train, and their Zeno's paradox
*You have heard this one*: A train leaves station _A_ and travels with constant velocity _v1_. A second train leaves station _B_...

environ un an ago

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Calculate Engine Power
Calculate Engine Power (P) in kW given the values of Torque(M) in Nm and Engine Speed(n) in rpm

environ un an ago

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Electrical Diode Current Calculation
In engineering, there is not always a single equation that describes a phenomenon accurately enough to be applied in all instanc...

environ un an ago

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An Ohm's Law Calculator
*BACKGROUND / MOTIVATION:* Many important observations in math and science can be described by short, but powerful, equations...

environ un an ago

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Create an anti-identity matrix
Create an anti-identity matrix of given dimension. Examples n = 2 A = [0 1; 1 0] n = 3 A = [0 0 1; 0 1 0; 1 0 0...

environ un an ago

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determine the sum of the squares
if x = 4, the solution will be: y = 1^2+2^2+3^2+4^2=1+4+9+16 = 30.

environ un an ago

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sum all digits
input = 123456789, output = 1+2+3+4+5+6+7+8+9 = 45

environ un an ago

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Convert from Base 10 to base 5
Convert the input number from base 10 into base 5: for example: if a(in base 10)= 5 then a(in base 5)= 10

environ un an ago

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Tridiagonal matrix
Given vectors u and v, make a tri-diagonal symmetric matrix such that u is in the main diagonal and v is below and above diagona...

environ un an ago

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Number Puzzle - 119

environ un an ago

Problem

Number Puzzle - 119

environ un an ago | 1 | 11 solvers

Solved

Number Puzzle - 118

environ un an ago

Problem

Number Puzzle - 118

environ un an ago | 1 | 11 solvers

Solved

Draw a '4' in a zero matrix!

environ un an ago

Solved

Draw a '6' in a zero matrix!

environ un an ago

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Draw a '9' in a zero matrix!

environ un an ago

Solved

Draw a '7' in a zero matrix!

environ un an ago

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Draw a '8' in a zero matrix!

environ un an ago

Solved

Draw a '5' in a zero matrix!

environ un an ago

Solved

Draw a '3' in a zero matrix!

environ un an ago

Solved

Draw a '1' in a zero matrix!

environ un an ago

Solved

Sum of series VIII

environ un an ago

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Sum of series IX

environ un an ago

Solved

Sum of series
a(n) = n^2 - (n-1)^2 find the summation of the series upto n i.e. a(1)+a(2)+...+a(n)

environ un an ago

Solved

easy problem
Find the last element of the array

environ un an ago