identity function

Summary

identity function ranks in the top 2% of general entities by monthly Wikipedia readership (111 views/month).^[1]

Key Facts

• identity function's subclass of is recorded as bijection^[2].
• identity function's subclass of is recorded as self-mapping^[3].
• identity function's subclass of is recorded as idempotent function^[4].
• identity function's subclass of is recorded as involution^[5].
• identity function's subclass of is recorded as endorelation^[6].
• identity function's Freebase ID is recorded as /m/03wwf^[7].
• identity function's different from is recorded as identity relation^[8].
• identity function's different from is recorded as bijection^[9].
• identity function's different from is recorded as zero function^[10].
• identity function's different from is recorded as null function^[11].
• identity function's TeX string is recorded as \operatorname{id}^[12].
• identity function's defining formula is recorded as x \mapsto x^[13].
• identity function's MathWorld ID is recorded as IdentityFunction^[14].
• identity function's MathWorld ID is recorded as IdentityMap^[15].
• identity function's MathWorld ID is recorded as IdentityOperator^[16].
• identity function's nLab ID is recorded as identity function^[17].
• identity function's Elhuyar ZTH ID is recorded as 133678^[18].
• identity function's Interlingual Index ID is recorded as i109356^[19].
• identity function's maintained by WikiProject is recorded as WikiProject Mathematics^[20].
• identity function's Microsoft Academic ID is recorded as 33222762^[21].
• identity function's OpenAlex ID is recorded as C33222762^[22].
• identity function's ScienceDirect topic ID is recorded as mathematics/identity-map^[23].
• identity function's ScienceDirect topic ID is recorded as engineering/identity-map^[24].
• identity function's Vikidia article ID is recorded as fr:Fonction_identité^[25].

Why It Matters

identity function ranks in the top 2% of general entities by monthly Wikipedia readership (111 views/month).^[1] It has Wikipedia articles in 27 language editions, a strong signal of global cultural recognition.^[26] It is known by 61 alternative names across languages and contexts.^[27]