Question: Who lived longer, Russ Ekeblad or Heinrich Franz Friedrich Tietze?
Sentence (from "Heinrich Franz Friedrich Tietze"): Tietze's graph is also named after him; it describes the boundaries of a subdivision of the Möbius strip into six mutually-adjacent regions, found by Tietze as part of an extension of the four color theorem to non-orientable surfaces.
Relevant evidence: No