X̂

X̂ é a letra latina X com circunflexo. A letra é usada na ortografia moderna da língua aleúte[1] e no atual alfabeto do Centro de Línguas Nativas de Alaska da língua haida. [2] Em ambos os casos, representa o som [χ].

Em matemática, x̂ geralmente se refere ao vetor unitário na direção +X. Nas estatísticas, também pode representar o valor estimado para x, consistente com a notação chapéu.[3]

Referências

  1. ↑ Bergsland, Knut (1994). Aleut Dictionary = Unangam Tunudgusii: an |D with hook and tail|ᶑ lexicon of the Aleutian, Pribilof, and Commander Islands Aleut language. Fairbanks, AK: Alaska Native Language Center, University of Alaska. ISBN 978-1-55500-047-9 
  2. ↑ Lachler, Jordan. «Ways of Writing Haida». Consultado em 25 novembro 2012 
  3. ↑ Bailey, Michael (2021). Real Stats: Using Econometrics for Political Science and Public Policy. [S.l.: s.n.] pp. 310–311. ISBN 978-0-19-085949-7 

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