$2$-Local Derivations on Finitary Incidence Algebras
DOI:
https://doi.org/10.29020/nybg.ejpam.v19i2.7218Keywords:
Finitary incidence algebra, local derivation, functional identitiesAbstract
Let \( P \) be a partially ordered set and \( R \) a commutative ring with identity. This paper investigates the finitary incidence algebra \( FI(P, R) \) and demonstrates that every \( R \)-linear local derivation on \( FI(P, R) \) is a derivation. Furthermore, we establish that when \( R \) possesses characteristic zero, every \( 2 \)-local derivation on \( FI(P, R) \) is also a derivation. Our proof builds upon functional identities and integrates insights from generalized Witt algebras. By examining the idempotent structure of \( FI(P, R) \), we show that \( 2 \)-local derivations do not exhibit any proper non-linear behavior.
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Copyright (c) 2026 Majed Zailaee, Mohd Arif Raza, Abdul Khan

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