bijective
意味: Describing a function or mapping that is both injective (one-to-one) and surjective (onto), establishing a perfect one-to-one correspondence between all elements of two sets.
A bijective function pairs every element of the domain with exactly one element of the codomain, and vice versa, with nothing left over on either side. Bijections are central to set theory, combinatorics, and abstract algebra, where they prove that two sets have the same cardinality (size). In cryptography, encryption functions must be bijective to ensure that every ciphertext can be uniquely decrypted. The term is strictly mathematical and rarely appears outside academic literature.
例文
- The mapping between students and examination seats must be bijective to ensure that each student has exactly one assigned place and no seat is left empty. 学生与考场座位之间的映射必须是双射的,以确保每个学生恰好有一个指定位置,且没有座位空置。La correspondencia entre alumnos y asientos de examen debe ser biyectiva para garantizar que cada alumno tenga exactamente un puesto asignado y que ningún asiento quede vacío.学生と試験座席との写像は全単射でなければならず、各学生にちょうど一つの座席が割り当てられ、空席が残らないことが保証される。학생과 시험 좌석 간의 사상은 전단사여야 하며, 각 학생에게 정확히 하나의 지정석이 배정되고 빈 좌석이 남지 않아야 한다.
- A bijective proof in combinatorics demonstrates that two seemingly different sets have the same number of elements by constructing an explicit one-to-one correspondence. 组合学中的双射证明通过构造明确的一一对应来证明两个看似不同的集合具有相同数量的元素。Una demostración biyectiva en combinatoria muestra que dos conjuntos aparentemente diferentes tienen el mismo número de elementos mediante la construcción de una correspondencia uno a uno explícita.組合せ論における全単射証明は、一見異なる二つの集合が同数の要素を持つことを、明示的な一対一対応を構成することで示す。조합론에서의 전단사 증명은, 일견 다른 두 집합이 동일한 수의 원소를 가짐을 명시적인 일대일 대응을 구성하여 보여준다.
- The encryption scheme requires a bijective function so that every plaintext message maps to a unique ciphertext and can be perfectly reversed. 该加密方案需要双射函数,以使每条明文消息映射到唯一的密文并可以完美还原。El esquema de cifrado requiere una función biyectiva para que cada mensaje en texto claro se corresponda con un texto cifrado único y pueda revertirse perfectamente.その暗号方式は全単射関数を必要とし、すべての平文メッセージが一意の暗号文に写像され、完全に復元できるようになっている。해당 암호 체계는 전단사 함수를 필요로 하여, 모든 평문 메시지가 고유한 암호문에 대응되고 완전히 복원될 수 있다.
発音
使い方ガイド
場面: scientific, academic
トーン: neutral
起源と歴史
From the French mathematical term bijection, coined in the mid-20th century by the Bourbaki group, combining the prefix bi- (two, both) with the Latin-derived -jection (throwing, casting), from jacere (to throw).
文化的背景
Era: Modern
Generation: All ages
Social background: Universal
このトピックの他の表現
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