## Ramakrishnan

Ramakrishnan Vaidyanathan

## 389 Reputation

7 years, 245 days

## Social Networks and Content at Maplesoft.com

With twenty years of Industrial experience and twenty years of teaching experience, I am now as retired Professor, using Maple to teach mathematics subject for students studying X to XII standards. Published XII Mathematics books.

## MaplePrimes Activity

### These are questions asked by Ramakrishnan

Maple

In the following problem though b and c are same (except the way denominator 2 is hanfled), command ' a-b ' readily answers zero, but a-c not so. Why? Only on condition of assumption real it gives zero!

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Why the answer is not given as zero?

What difference therms b and c make for Maple? Are they not same?

Ramakrishnan V

rukmini_ramki@hotmail.com

## How to remove block ?...

Maple MaplePrimes

There have come unwanted lines and marks . I donot know how to remove them. Using doc.block, remove block seems to be little tough to incorporate! Please enlighten me. Modified doc. is most welcome. Thanks. Ramakrishnan V

 Gaussian Elimination Method

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Coefficient Tanle
 Equation 1 Equation 2 Equation 3 Equations =  =  =

The equations in matrix form is given by

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The Gaussian Elimination gives the simplified natrix equation as given below:

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The equations in simplified form are:

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The aolution ia obtained by solving the above equations in reverse order

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## How to avoid duplication?...

Maple

I have used conduction Fourier formula to find k or q or T. Each time i hAvE to run from restart and units. Can this duplication be eliminated?
How do i rewrite the codes?

Thanks for considering this worth answering.

Ramakrishnan Vaidyanathan

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clear

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clear

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## Solving two or three simultaneous second...

Maple

How do i proceed to solve two differential equations?

Two equations two unknowns is easy to solve in polynomial algebraic equations. Example: x+y=5; x-y=3; The solution is x=4; y=1 by adding the equations we arrive at.

The two equations are second order differential equations with two variables say temperature T (x,y) and velocity c(x,y). Assume any simple equation (one dimensional as well i.e. T(x) and c(x) which you can demonstrate with ease, I have not formulated the exact equations and boundary conditions yet for SI Engine simulation.

Ramakrishnan

## Plot command for solution to DE after th...

y(t) = _C1*exp(-1.*t)*sin(.57736*t)+_C2*exp(-1.*t)*cos(.57736*t)

The answer i got for a DE raised in mapleprime is given above.

What command do i write now to get a plot of the same?

Ramakrishnan V

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