/** Test coefficient map function. */
public void testMap() {
// integers
BigInteger rf = new BigInteger();
// System.out.println("rf = " + rf);
// polynomials over integral numbers
GenPolynomialRing<BigInteger> pf = new GenPolynomialRing<BigInteger>(rf, rl);
// System.out.println("pf = " + pf);
// random polynomial
GenPolynomial<BigInteger> p = pf.random(kl, 2 * ll, el, q);
// System.out.println("p = " + p);
// test times 1
GenPolynomial<BigInteger> q;
q = p.map(new Multiply<BigInteger>(rf.getONE()));
assertEquals("p == q ", p, q);
// test times 0
q = p.map(new Multiply<BigInteger>(rf.getZERO()));
assertTrue("q == 0 ", q.isZERO());
// test times -1
q = p.map(new Multiply<BigInteger>(rf.getONE().negate()));
assertEquals("p == q ", p.negate(), q);
}
public static void example2() {
UnivPowerSeries<BigInteger> integers = integersFrom(0);
System.out.print("integer coefficients = ");
UnivPowerSeries<BigInteger> s = integers;
for (int i = 0; i < 20; i++) {
BigInteger c = s.leadingCoefficient();
System.out.print(c.toString() + ", ");
s = s.reductum();
}
System.out.println("...");
}
/** Test iterators. */
public void testIterators() {
// integers
BigInteger rf = new BigInteger();
// System.out.println("rf = " + rf);
// polynomials over integral numbers
GenPolynomialRing<BigInteger> pf = new GenPolynomialRing<BigInteger>(rf, rl);
// System.out.println("pf = " + pf);
// random polynomial
GenPolynomial<BigInteger> p = pf.random(kl, 2 * ll, el, q);
// System.out.println("p = " + p);
// test monomials
for (Monomial<BigInteger> m : p) {
// System.out.println("m = " + m);
assertFalse("m.c == 0 ", m.coefficient().isZERO());
assertFalse("m.e < (0) ", m.exponent().signum() < 0);
}
// test exponents
Iterator<ExpVector> et = p.exponentIterator();
while (et.hasNext()) {
ExpVector e = et.next();
// System.out.println("e = " + e);
assertFalse("e < (0) ", e.signum() < 0);
}
// test coefficents
Iterator<BigInteger> ct = p.coefficientIterator();
while (ct.hasNext()) {
BigInteger i = ct.next();
// System.out.println("i = " + i);
assertFalse("i == 0 ", i.isZERO());
}
}