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Record W1556245666 · doi:10.1109/lics.2004.52

VTC: A Second-Order Theory for TC

2004· article· en· W1556245666 on OpenAlex

Why this work is in the frame

A frame that forgets how it found something cannot be audited. These are the routes that admitted this work.

affAt least one author lists a Canadian institution in the pinned OpenAlex snapshot.

Bibliographic record

VenueTSpace · 2004
Typearticle
Languageen
FieldComputer Science
TopicComputability, Logic, AI Algorithms
Canadian institutionsUniversity of Toronto
Fundersnot available
KeywordsMathematicsOrder (exchange)Discrete mathematicsClass (philosophy)CombinatoricsModel theoryAxiomPolynomialComputer scienceMathematical analysis

Abstract

fetched live from OpenAlex

We introduce a finitely axiomatizable second-order theory VTC 0 and show that it characterizes precisely the class uniform TC0. It is simply the theory V0 [12] together with the axiom NUMONES, which states the existence of a "counting array" Y for any string X : the ith row of Y contains only the number of 1 bits upto (excluding) bit i of X. First, we introduce the notion of "strong DB1 -definability" for relations in a theory, and use the recursive properties of TC0 relations (rather than functions) to show that TC0 relations are strongly DB1 -definable, and TC0 functions are SB1 -definable in VTC0. Then, we generalize the Witnessing Theorem for V0 [12], and obtain the witnessing theorem for VTC0 from this general result: exist;SB0+ SB1 theorems of VTC0 can be witnessed by TC0 functions (here, SB0+S B1 formulas are those obtained from SB1 formulas using and;, or; and bounded number quantifications). Finally, we show that VTC0 is RSUV isomorphic to the first-order theory Db1 -CR, which has been claimed the "minimal" theory for TC0 [20]. This isomorphism shows that VTC0 admits the SB0+D B1 comprehension rule. Hence, in VTC0, strong DB1 -definability and the usual DB1 -definability coincide. It also follows that Db1 - CR = Db1 - CRi, for some i. This answers affirmatively an open question from [20].

Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.

Full frame distilled prediction

Teacher imitation

Not calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.

metaresearch head score (Codex)0.001
metaresearch head score (Gemma)0.000
Version: codex-gemma-dda1882f352aValidation status: machine_predicted_unvalidated
Candidate categoriesnone
Consensus categoriesnone
DomainCandidate signal: none · Consensus signal: none
Study designCandidate signal: Theoretical or conceptual · Consensus signal: Theoretical or conceptual
GenreCandidate signal: Methods · Consensus signal: Methods
Teacher disagreement score0.349
Threshold uncertainty score0.607

Codex and Gemma teacher scores by category

CategoryCodexGemma
Metaresearch0.0010.000
Meta-epidemiology (narrow)0.0000.000
Meta-epidemiology (broad)0.0000.000
Bibliometrics0.0000.000
Science and technology studies0.0000.000
Scholarly communication0.0000.000
Open science0.0010.000
Research integrity0.0000.000
Insufficient payload (model declined to judge)0.0000.000

Machine scores (provisional)

The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.

Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.

Opus teacher head0.022
GPT teacher head0.309
Teacher spread0.287 · how far apart the two teachers sit on this one work
Validation statusscore_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from it