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f-Polynomial on Some Graph Operations

f-Polynomial on Some Graph Operations

Given any function f : Z + โ†’ R + , let us define the f-index I f ( G ) = โˆ‘ u โˆˆ V ( G ) f ( d u ) and the f-polynomial P f ( G , x ) = โˆ‘ u โˆˆ V ( โ€ฆ