Examples of jmathexpr.arithmetic.op.Subtraction

jmathexpr.arithmetic.op.Subtraction
The binary operation subtraction (minus). @author Elemér Furka

    @Test(dependsOnMethods = { "testRationalExpressions" })
    public void testRealExpressions() {
        Expression evaluated;
        RealNumber r0d1 = R.create(0.1);
        RealNumber div = R.create(1.0/10);
        Subtraction diff = new Subtraction(r0d1, div);
        
        RealNumber zero = R.create(0.0);
        Equality zeroTest = new Equality(diff, zero);
        
        evaluated = zeroTest.evaluate();

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        evaluated = sum.evaluate();
        System.out.printf("%s = %s%n", sum, evaluated);
        assertEquals(evaluated, new LongRationalNumber(5, 6));
        
        Expression difference = new Subtraction(oneHalf, oneThird);
        evaluated = difference.evaluate();
        System.out.printf("%s = %s%n", difference, evaluated);
        assertEquals(evaluated, new LongRationalNumber(1, 6));
        
        RationalNumber sixEighth = new LongRationalNumber(6, 8);
        evaluated = sixEighth.evaluate();
        System.out.printf("%s = %s%n", sixEighth, evaluated);
        assertEquals(evaluated, new LongRationalNumber(3, 4));
        
        difference = new Subtraction(new LongRationalNumber(2, 3), new LongRationalNumber(1, 6));
        evaluated = difference.evaluate();
        System.out.printf("%s = %s%n", difference, evaluated);
        assertEquals(evaluated, new LongRationalNumber(1, 2));
        
        Expression product = new Multiplication(new LongRationalNumber(2, 3), new LongRationalNumber(9, 2));
        ElementOf isNatural = new ElementOf(product, N);

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    @Test(dependsOnMethods = { "testNaturalExpressions" })
    public void testIntegerExpressions() {
        IntegerNumber ten = Z.create(10);
        IntegerNumber eleven = Z.create(11);  
        Expression integerExpr = new Subtraction(ten, eleven);
        
        System.out.printf("%s = %s%n", integerExpr, integerExpr.evaluate());        
        assertEquals(integerExpr.evaluate(), Z.create(-1));
    }

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         */
        private class SubtractionC extends SubRule {


            @Override
            public boolean matches(Expression expr) {
                return new Equality(new Subtraction(ax, b), c).matches(expr);
            }

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         */
        private class SubtractionX extends SubRule {


            @Override
            public boolean matches(Expression expr) {
                return new Equality(new Subtraction(b, ax), c).matches(expr);
            }

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         */
        private class Difference extends SubRule {


            @Override
            public boolean matches(Expression expr) {
                ExpressionPattern diff = new Subtraction(s, a);
                
                return new Equality(diff, b).matches(expr);
            }

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        if (evaluated instanceof TruthValue) {
            return evaluated;
        } else {
            Expression reduced =
                    new Subtraction(((Equality) evaluated).lhs(), ((Equality) evaluated).rhs()).evaluate();
            TruthValue isZero = isZero(reduced);
            
            if (isZero != null) {
                return isZero;
            }

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         */
        private class SqrtSubtract extends SubRule {


            @Override
            public boolean matches(Expression expr) {
                ExpressionPattern diff = new Subtraction(s, a);
                
                return new Equality(diff, b).matches(expr);
            }

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        if (degree().equals(two)) {
            Expression a = coeffs.get(two);
            Expression b = coeffs.get(ONE);
            Expression c = coeffs.get(ZERO);
            
            return new Subtraction(new Exponentiation(b, two),
                    new Multiplication(four, new Multiplication(a, c)));
        } else {
            throw new UnsupportedOperationException("Cannot compute discriminant: " + this);
        }
    }

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                p = (NaturalNumber) n.add(i);
                
                rp = r.get(p);
                bi = b.coeffs.get(i);
                
                rp = rp != null ? new Subtraction(rp, new Multiplication(c, bi)).evaluate()
                        : new Negation(new Multiplication(c, bi)).evaluate();


                if (rp instanceof ANumber && ((ANumber) rp).isZero() && !p.isZero()) {
                    r.remove(p);
                } else {

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jmathexpr.arithmetic.equation.Equation

jmathexpr.arithmetic.equation.LinearEquation$AxpBeC$SubtractionC

jmathexpr.arithmetic.equation.LinearEquation$AxpBeC$SubtractionX

jmathexpr.arithmetic.equation.QuadraticEquation$QuadraticFormula

jmathexpr.arithmetic.equation.RadicalEquation$SeparateRadicals$SqrtSubtract

jmathexpr.arithmetic.Polynomial

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