#119: Solve( (k*Q*q)/r^2==E, r) throws arithmetic exception: invalid exponent -2
Issue #119
resolved
I used your online demo applications and was able to use "solve( (kQq)/r^2==E, r )", but when I try to do the same thing in Java, the console tells me that I have an "invalid exponent -2".
import org.matheclipse.core.basic.Config;
import org.matheclipse.core.eval.ExprEvaluator;
import org.matheclipse.core.interfaces.IExpr;
import org.matheclipse.parser.client.SyntaxError;
import org.matheclipse.parser.client.math.MathException;
/**
* A test for the Symja Library
*
* @author Stanton Parham (stanton8parham8@gmail.com)
*/
public class TEST_SYMJA {
public static void main(String[] args) {
try {
// don't distinguish between lower- and uppercase identifiers
Config.PARSER_USE_LOWERCASE_SYMBOLS = true;
ExprEvaluator util = new ExprEvaluator(false, 100);
IExpr result = util.evaluate("Solve((k*Q*q)/r^2==E,r)");
// print: r == Sqrt((k*Q*q)/E)
System.out.println(result.toString());
} catch (SyntaxError e) {
// catch Symja parser errors here
System.out.println(e.getMessage());
} catch (MathException me) {
// catch Symja math errors here
System.out.println(me.getMessage());
} catch (Exception e) {
e.printStackTrace();
}
}
}
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Started solving this issue with commit 1989191