Package jmathexpr

Examples of jmathexpr.Expression

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    @Test
    public void testPolynomials() {
        ExpressionParser parser = new ExpressionParser();
       
        Expression expression = parser.parse("let x in R");
       
        Logger.dump(expression);
    }
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        System.out.printf("%s : %s = ?%n", abs, x);
       
        Set roots = abs.solve();
        System.out.printf("  %s = %s%n", x, roots);
       
        Expression expected = new FiniteSet(Naturals.getInstance().create(3), Integers.getInstance().create(-2));
        assertEquals(expected, roots);
    }
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        System.out.printf("%s : %s = ?%n", abs, x);
       
        Set roots = abs.solve();
        System.out.printf("  %s = %s%n", x, roots);
       
        Expression expected = new FiniteSet(Rationals.getInstance().create(13, 5), Rationals.getInstance().create(-1, 5));
        assertEquals(expected, roots);
    }
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        System.out.printf("%s : %s = ?%n", abs, x);
       
        Set roots = abs.solve();
        System.out.printf("  %s = %s%n", x, roots);
       
        Expression expected = new FiniteSet(Integers.getInstance().create(-2), Rationals.getInstance().create(-1, 3));
        assertEquals(expected, roots);
    }
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        System.out.printf("%s : %s = ?%n", abs, x);
       
        Set roots = abs.solve();
        System.out.printf("  %s = %s%n", x, roots);
       
        Expression x1 = parser.parse("(15 + sqrt(249)) / 4");
        Expression x2 = parser.parse("(15 - sqrt(249)) / 4");
        Expression expected = new FiniteSet(x1, x2, Rationals.getInstance().create(7, 2), Naturals.one());
        assertEquals(expected, roots);
    }
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        System.out.printf("%s : %s = ?%n", abs, x);
       
        Set roots = abs.solve();
        System.out.printf("  %s = %s%n", x, roots);
       
        Expression x1 = parser.parse("sqrt(3)");
        Expression x2 = Integers.getInstance().create("-3");
        Expression expected = new FiniteSet(x1, x2);
        assertEquals(expected, roots);
    }
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//        for (Equality e : lineq.getSteps()) {
//            System.out.printf("    %s%n", e);
//        }
       
        Expression expected = new ExpressionParser().parse("(sqrt(5) + sqrt(3)) / sqrt(2)");
       
        assertEquals(roots, new FiniteSet(expected));
    }
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        System.out.printf("%s : %s = ?%n", quad, x);

        Set roots = quad.solve();
        System.out.printf("  %s = %s%n", x, roots);
       
        Expression x1 = parser.parse("(5 + sqrt(13)) / 2");
        Expression x2 = parser.parse("(5 - sqrt(13)) / 2");
        Expression expected = new FiniteSet(x1, x2);
        assertEquals(expected, roots);
    }
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        System.out.printf("%s : %s = ?%n", quad, x);
       
        Set roots = quad.solve();
        System.out.printf("  %s = %s%n", x, roots);
       
        Expression expected = new EmptySet();
        assertEquals(expected, roots);
    }
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        System.out.printf("%s : %s = ?%n", quad, x);

        Set roots = quad.solve();
        System.out.printf("  %s = %s%n", x, roots);
       
        Expression expected = new FiniteSet(Naturals.one(), Rationals.getInstance().create(-1, 2));
        assertEquals(expected, roots);
    }
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Related Classes of jmathexpr.Expression

  • jmathexpr.arithmetic.equation.AbsoluteValueEquation$Isolate$Addition
  • jmathexpr.arithmetic.equation.AbsoluteValueEquation$Isolate$Difference
  • jmathexpr.arithmetic.equation.AbsoluteValueEquation$IterativeRule
  • jmathexpr.arithmetic.equation.Equation
  • jmathexpr.arithmetic.equation.LinearEquation
  • jmathexpr.arithmetic.equation.LinearEquation$AxeB
  • jmathexpr.arithmetic.equation.LinearEquation$AxpBeC$SubtractionC
  • jmathexpr.arithmetic.equation.LinearEquation$AxpBeC$SubtractionX
  • jmathexpr.arithmetic.equation.LinearEquation$VariableOnBothSides
  • jmathexpr.arithmetic.equation.QuadraticEquation
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