CIFT-Applied I: The Stjepovic Arithmetic Method — A Unified Algorithmic Framework for Elementary Arithmetic: Granero, Siembra y Cosecha

The Stjepovic Arithmetic Method is a unified algorithmic framework for elementary arithmetic — addition and subtraction — developed autonomously by the author from direct RC³ experience. Its foundational principle — that subtraction is always an addition — is not a pedagogical metaphor but a formal mathematical identity operationalized through a single three-phase algorithm: Granero (field initialization), Siembra (structural transformation), and Cosecha (result extraction). The algorithm eliminates mid-execution conditional branching by separating transformation from evaluation: all structural adjustments are resolved during Siembra before any result digit is read during Cosecha. Computational validation across 1, 000 random cases and 15 boundary conditions confirmed 100% agreement with standard arithmetic. From the CIFT-EXEC framework (Paper VI), the method is interpreted as a direct optimization of three modulable parameters: η (x, t) reduction through elimination of runtime exceptions, G (x, t) exploitation through reuse of the pre-consolidated addition schema, and Dₑff enhancement through unification of addition and subtraction into a single cortical pathway. This paper inaugurates the CIFT-Applied series as a longitudinal research program deriving RC³-adapted instructional tools from first principles. v3 (abril 2026): Corrección conceptual para coherencia con el principio "no hay restas, todo es suma". La cosecha de resta sin saldo se reescribe como distancia (dígito inferior +? = dígito superior), eliminando el signo − de la notación. Se corrigen además errores numéricos en Tabla 2 (saldos y cosechas de columnas D y C).