Function installCaches

src/compute-engine/rubi/rubi-utils.ts:414–416

(caches: Ctx['caches'])

  const lc0 = polyCoeffsX(L, x);
  if (pc0 === null || lc0 === null) return null;
  const lc = trimZeros(lc0);
  if (lc.length === 1 && zeroQ(lc[0])) return null; // division by zero
  let pc = trimZeros(pc0);
  const q: Expression[] = new Array(
    Math.max(0, pc.length - lc.length + 1)
  ).fill(ce.Zero);