<abstract xmlns="http://www.w3.org/1999/xhtml">This paper presents Unlimited Computable AI, or UCAI, that is a family of computable variants of AIXI. UCAI is more powerful than AIXI<italic>tl</italic>, which is a conventional family of computable variants of AIXI, in the following ways: 1) UCAI supports models of terminating computation, including typed lambda calculi, while AIXI<italic>tl</italic> only supports Turing machine with timeout ˜<italic>t</italic>, which can be simulated by typed lambda calculi for any ˜<italic>t</italic>; 2) unlike UCAI, AIXI<italic>tl</italic> limits the program length to some ˜<italic>l</italic> .</abstract>

Computable Variants of AIXI which are More Powerful than AIXI<italic>tl</italic>

<abstract xmlns="http://www.w3.org/1999/xhtml">Legg and Hutter, as well as subsequent authors, considered intelligent agents through the lens of interaction with reward-giving environments, attempting to assign numeric intelligence measures to such agents, with the guiding principle that a more intelligent agent should gain higher rewards from environments in some aggregate sense. In this paper, we consider a related question: rather than measure numeric intelligence of one Legg-Hutter agent, how can we compare the relative intelligence of two Legg-Hutter agents? We propose an elegant answer based on the following insight: we can view Legg-Hutter agents as candidates in an election, whose voters are environments, letting each environment vote (via its rewards) which agent (if either) is more intelligent. This leads to an abstract family of comparators simple enough that we can prove some structural theorems about them. It is an open question whether these structural theorems apply to more practical intelligence measures.</abstract>

Intelligence via ultrafilters: structural properties of some intelligence comparators of deterministic Legg-Hutter agents

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Computable Variants of AIXI which are More Powerful than AIXItl

Intelligence via ultrafilters: structural properties of some intelligence comparators of deterministic Legg-Hutter agents

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