"Source: Text/Algebra/AlgQuat.text";
"Line: 169";
"Date: Wed Sep  4 15:52:10 2019";
"Main: Thu May 25 10:02:38 2023";
// original file: Text/Algebra/AlgQuat.text, line: 169
// Example: H93E1 ()
print "Example: H93E1";
ei := GetEchoInput();
SetEchoInput(true);
A<x,y,z> := QuaternionAlgebra< RationalField() | -1, -7 >; 
x^2;
assert $1 eq -1;
y^2;
assert $1 eq -7;
x*y;
SetEchoInput(ei);
