﻿ QED Solver for Windows - Calculations have never been this fast or easy!
QED Solver
for Windows
We believe there's a better way to do mathematical calculations, and that's why we created QED Solver. QED is a computing platform designed for solving science & engineering problems.  # QED Solver for Windows: your calculations, simplified

## Power and simplicity, at your fingertips

• Solve a wide variety of math problems - no calculation is too big or small.
• Plot beautiful charts just by specifying the expression. Customize your charts with a wide variety of options.
• Enter your calculation with ease. We've made the syntax as close to natural language as possible and provided easy access to commonly used mathematical symbols and operators.
• Create professional solution reports. Solution reports are automatically generated for every solved problem.
• Share your problem or solutions. Share them via email or print.
• Create your own functions with ease. Creating your own functions provides an efficient way of making your problem both compact and elegant. # Problems for Students

// Simple Linear Equations

2x + y + z = 7 // Equation 1
x - y + z = 2 // Equation 2
x + y - z = 0 // Equation 3

// A simple function plot, the chart will automatically scale to the optimal size

plot sin(x)/x

// Alternatively, you can customze the chart with a wide variety of options

plot sin(x)/x,
charttitle="The Chart Title", // chart title
xlabel="x label", // X-axis label
ylabel="y label", // Y-axis label
xrange=0..10,
transparency=0.5,
thickness=2,
cos(x)/x,
seriesname="another series name",
transparency=0.5,
thickness=2

// A finance problem with several equations

A = 1000 // \$ initial capital
r = 1.10 // annual growth rate of 10%
Afinal = 10000 // \$ final capital
Afinal = A * r^N // N is number of years to achieve Afinal capital and will be solved for automatically

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# Engineering Problems

// Coupled Nonlinear Equations

β / λ = 1 / (1 + exp(β) + exp() + exp(-β^2))

λ * β = 1 / (1 + λ^β)

β > 0
λ > 0

// User Defined Functions (Single & Multi-Line)

f(x) := // Function f is multi-line
{
// Variables a, b, y are local to the function if not defined previously
a = 1 // Line 1
b = 2 // Line 2
y = a + b * x // Line 3
result = y * y
// Multi-line functions must always return a result

}

g(x) := sin(x) / (1 + |x|) // Single line function

// Using user defined functions
y = f(2)
z = g(5)

λ = g(1 + f(z)) // A function parameter may be an expression

// Numerical Integration & Differentiation

// Function to integrate, symmetrical around x = 0
g(x) := exp(-x^2)

// Numerical integral of g(x) from 0 to t

f(t) := integ(g(x),x,0,t)

a = deriv(f(x),x,1)
a_true = g(1)

b = deriv(f(x),x,2)
b_true = g(2)

c = deriv(f(x),x,3)
c_true = g(3)

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