PH

Summary

PH is a complexity class^[1]. PH draws 11 Wikipedia views per month (complexity_class category, ranking #36 of 61).^[2]

Key Facts

• PH's instance of is recorded as complexity class^[3].
• polynomial hierarchy is named after PH^[4].
• PH's subclass of is recorded as computational problem^[5].
• PH's part of is recorded as PSPACE^[6].
• PH's has part is recorded as Π2P^[7].
• PH's Freebase ID is recorded as /m/030dqt^[8].
• PH's defining formula is recorded as \mathrm{PH} = \bigcup_{k\in\mathbb{N}} \Delta_k^\mathrm{P}^[9].
• PH's BabelNet ID is recorded as 03506650n^[10].
• PH's maintained by WikiProject is recorded as WikiProject Mathematics^[11].
• PH's Microsoft Academic ID is recorded as 122806257^[12].
• PH's OpenAlex ID is recorded as C122806257^[13].

Why It Matters

PH draws 11 Wikipedia views per month (complexity_class category, ranking #36 of 61).^[2] PH has Wikipedia articles in 11 language editions, a strong signal of global cultural recognition.^[14] PH is known by 7 alternative names across languages and contexts.^[15]