How to use

Abs

in

jscl.math.function

public Generic antiDerivative(int n) throws NotIntegrableException {
  return new Abs(parameters[0]).selfExpand();
}

public Generic selfElementary() {
  return new Fraction(parameters[0], new Abs(parameters[0]).selfElementary()).selfElementary();
}

public Generic selfExpand() {
  if (parameters[0].signum() < 0) {
    return new Abs(parameters[0].negate()).selfExpand();
  }
  try {
    return parameters[0].integerValue().abs();
  } catch (NotIntegerException e) {
  }
  return expressionValue();
}

public Generic selfSimplify() {
  if (parameters[0].signum() < 0) {
    return new Abs(parameters[0].negate()).selfSimplify();
  }
  try {
    return parameters[0].integerValue().abs();
  } catch (NotIntegerException e) {
  }
  try {
    Variable v = parameters[0].variableValue();
    if (v instanceof Abs) {
      Function f = (Function) v;
      return f.selfSimplify();
    } else if (v instanceof Sgn) {
      return JsclInteger.valueOf(1);
    }
  } catch (NotVariableException e) {
  }
  return expressionValue();
}

  @Nonnull
  public Variable newInstance() {
    return new Abs(null);
  }
}

public void toMathML(MathML element, Object data) {
  int exponent = data instanceof Integer ? (Integer) data : 1;
  if (exponent == 1) bodyToMathML(element);
  else {
    MathML e1 = element.element("msup");
    bodyToMathML(e1);
    MathML e2 = element.element("mn");
    e2.appendChild(element.text(String.valueOf(exponent)));
    e1.appendChild(e2);
    element.appendChild(e1);
  }
}

public Generic antiDerivative(int n) throws NotIntegrableException {
  return Constants.Generic.HALF.multiply(parameters[0]).multiply(new Abs(parameters[0]).selfExpand());
}