length_pos_of_head_eq_head_of_last_eq_last_of_length_pos — Mathlib · SciLib

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length_pos_of_head_eq_head_of_last_eq_last_of_length_pos

Mathlib.Order.JordanHolder

URI: https://scilib.ai/kg/mathlib#CompositionSeries.length_pos_of_head_eq_head_of_last_eq_last_of_length_pos

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