Titlebook: Reverse Mathematics; Problems, Reductions Damir D. Dzhafarov,Carl Mummert Textbook 2022 The Editor(s) (if applicable) and The Author(s), un

calcification

書(shū)目名稱(chēng)Reverse Mathematics影響因子(影響力)




書(shū)目名稱(chēng)Reverse Mathematics影響因子(影響力)學(xué)科排名




書(shū)目名稱(chēng)Reverse Mathematics網(wǎng)絡(luò)公開(kāi)度




書(shū)目名稱(chēng)Reverse Mathematics網(wǎng)絡(luò)公開(kāi)度學(xué)科排名




書(shū)目名稱(chēng)Reverse Mathematics被引頻次




書(shū)目名稱(chēng)Reverse Mathematics被引頻次學(xué)科排名




書(shū)目名稱(chēng)Reverse Mathematics年度引用




書(shū)目名稱(chēng)Reverse Mathematics年度引用學(xué)科排名




書(shū)目名稱(chēng)Reverse Mathematics讀者反饋




書(shū)目名稱(chēng)Reverse Mathematics讀者反饋學(xué)科排名

Constant

反饋

packet

Second order arithmetic if we temporarily assume as an axiom that a problem P is solvable, how difficult is it to . that a second problem Q is solvable? If we can prove that Q is solvable under the assumption that P is solvable, this gives us information that Q is “weaker” than P, at least modulo the other axioms used in

Indecisive

Fulminate

FOIL

Set theory and beyond”.We cannot easily talk about . (equivalence classes of well orderings) as such in Z., but many properties of the ordinals can be formulated in terms of specific well orderings instead. We have already seen that ATR. can express many such properties quite naturally. In this chapter, we investigate a

情感脆弱

系列

Project

Problem reducibilitiesr does not, then we may view the latter as “harder” from a certain computational standpoint. But it is not obvious how to find such a class for a particular pair of problems, or whether such a class even exists. It is also unclear what relationship this kind of classification really expresses.