{"id":"e-f8a49e57c7ccb041","operation":{"operation":"obreschkoff_combination"},"operation_detail":null,"conclusion_id":"n-c1c85c02d99ce8cf","premise_count":2,"theorem":"Hermite--Kakeya--Obreschkoff: real-rooted f, g with interlacing zeros give a zero or real-rooted a f + b g for all real a, b (Obreschkoff 1963; Fisk, Polynomials, roots, and interlacing, Thm 1.43)","lean_route":null,"lean_declarations":[],"certificate_hash":"d11f0b6105d08b717ff9492b2179380a0a31fc1175862899b6ca2208260d309c","verification_polytool":"replayed","verification_lean":"not_attempted","certificate_kind":"obreschkoff_combination","certificate_raw_size":12245,"certificate_compressed_size":2706,"conclusion_name":"obreschkoff_combination of Coefficient triangle for polynomials used for o.g.f.s for unsigned Stirling1 diagonals.","claims":[{"claim":"real_rooted","from_index":0,"region":{}}],"premises":[{"position":0,"node_id":"n-9b757b008ff4762d","role":"sequence","name":"Coefficient triangle for polynomials used for o.g.f.s for unsigned Stirling1 diagonals.","uses":{"claim":"real_rooted","from_index":0,"region":{}},"uses_text":"Every row P_n, n >= 0, is zero or real-rooted with all roots in (-inf, +inf)"},{"position":1,"node_id":"n-9b757b008ff4762d","role":"sequence","name":"Coefficient triangle for polynomials used for o.g.f.s for unsigned Stirling1 diagonals.","uses":{"claim":"interlacing","from_index":1,"kind":"weak","orientation":"unordered"},"uses_text":"Rows P_(m-1), P_m interlace (weak, unordered) for every m >= 1"}],"cited_by":[{"node_id":"n-c1c85c02d99ce8cf","claim":"real_rooted"}]}