Apakah mungkin untuk menguji apakah bilangan yang dihitung rasional atau bilangan bulat?

Apakah mungkin untuk menguji secara algoritmik apakah bilangan yang dihitung rasional atau bilangan bulat? Dengan kata lain, apakah mungkin bagi perpustakaan yang mengimplementasikan angka yang dapat dihitung untuk menyediakan fungsi isIntegeratau isRational? Saya menduga itu tidak mungkin, dan...

computability computing-over-reals lambda-calculus graph-theory co.combinatorics cc.complexity-theory reference-request graph-theory proofs np-complete cc.complexity-theory machine-learning boolean-functions combinatory-logic boolean-formulas reference-request approximation-algorithms optimization cc.complexity-theory co.combinatorics permutations cc.complexity-theory cc.complexity-theory ai.artificial-intel p-vs-np relativization co.combinatorics permutations ds.algorithms algebra automata-theory dfa lo.logic temporal-logic linear-temporal-logic circuit-complexity lower-bounds permanent arithmetic-circuits determinant dc.parallel-comp asymptotics ds.algorithms graph-theory planar-graphs physics max-flow max-flow-min-cut fl.formal-languages automata-theory finite-model-theory dfa language-design soft-question machine-learning linear-algebra db.databases arithmetic-circuits ds.algorithms machine-learning ds.data-structures tree soft-question security project-topic approximation-algorithms linear-programming primal-dual reference-request graph-theory graph-algorithms cr.crypto-security quantum-computing gr.group-theory graph-theory time-complexity lower-bounds matrices sorting asymptotics approximation-algorithms linear-algebra matrices max-cut graph-theory graph-algorithms time-complexity circuit-complexity regular-language graph-algorithms approximation-algorithms set-cover clique graph-theory graph-algorithms approximation-algorithms clustering partition-problem time-complexity turing-machines term-rewriting-systems cc.complexity-theory time-complexity nondeterminism