Matrixcalc

This is a fork of https://openrepos.net/content/fruct/matrix-calculator to make it available for aarch64, actually noarch. I'm looking at porting it's plotting (which uses D3js) to Babbage. From the original repo:

This application is an engineering graphical calculator, an indispensable tool for students in high school, college and graduate school, or just for those who need a calculator with more features than usual. It is designed to replace cumbersome and expensive calculators and works on mobile based Sailfish OS.

The application has several pages that have the following capabilities:

CALCULATOR

• Perform arithmetic operations +, -, *, /, ÷
• Calculation of the root of any degree
• Exponentials, logarithms (ln, log)
• Trigonometric functions sin(π /2), cos 30 °, ...
• Mathematical constants (e, pi ...)
• Erection to any degree
• Calculation of the module, factorial of a number
• Saving / loading history

SOLUTION OF EQUATIONS

• Input of each coefficient on a separate line
• The possibility of solving trigonometric, exponential and power equations
• Mapping of real and complex roots of equation
• The ability to see the results when filling out the equation form

MATRIX CALCULATOR

• Performing transpose, addition, multiplication and subtraction of matrices
• Calculation of rank and determinant matrix
• Convenient coordinate input of matrix values
• Possibility to set the size from 1х1 to 15х15
• Convenient display of calculation results