Game Characterizations and Lower Cones in the Weihrauch Degrees
Game Characterizations and Lower Cones in the Weihrauch Degrees
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游戏特征和 Weihrauch 度数中的下锥体
DOI:
10.23638/lmcs-15(3:11)2019
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发表时间:
2015
期刊:
影响因子:
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通讯作者:
A. Pauly
中科院分区:
文献类型:
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作者:
H. Nobrega;A. Pauly
We introduce a parametrized version of the Wadge game for functions and show that each lower cone in the Weihrauch degrees is characterized by such a game. These parametrized Wadge games subsume the original Wadge game, the eraser and backtrack games as well as Semmes's tree games. In particular, we propose that the lower cones in the Weihrauch degrees are the answer to Andretta's question on which classes of functions admit game characterizations.
We then discuss some applications of such parametrized Wadge games. Using machinery from Weihrauch reducibility theory, we introduce games characterizing every (transfinite) level of the Baire hierarchy via an iteration of a pruning derivative on countably branching trees.
DOI:
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发表时间:
2022
期刊:
影响因子:
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作者:
Takehiro Hasegawa;Takashi Komatsu;Norio Konno;Hayato Saigo;Seiken Saito;Iwao Sato;Shingo Sugiyama;Takayuki Kihara
通讯作者:
Takayuki Kihara