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Record W2073360418 · doi:10.1137/050624376

The Linking Probability of Deep Spider-Web Networks

2006· article· en· W2073360418 on OpenAlex
Nicholas Pippenger

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.

fundA Canadian funder is recorded on the work.
no affNo Canadian affiliation: this work is invisible to an affiliation-only frame.
No Canadian affiliation. An affiliation-only frame, the usual design, would never have seen this work. It is one of the works that make the case for inverting the frame.

Bibliographic record

VenueSIAM Journal on Discrete Mathematics · 2006
Typearticle
Languageen
FieldComputer Science
TopicInterconnection Networks and Systems
Canadian institutionsnot available
FundersBanff International Research Station for Mathematical Innovation and Discovery
KeywordsCombinatoricsMathematicsVertex (graph theory)Discrete mathematicsRandom variablePath (computing)Crossbar switchInfinityIdleStatisticsComputer scienceMathematical analysisGraphTelecommunications

Abstract

fetched live from OpenAlex

We consider crossbar switching networks with base b (that is, constructed from $b\times b$ crossbar switches), scale k (that is, with $b^k$ inputs, $b^k$ outputs, and $b^k$ links between each consecutive pair of stages), and depth l (that is, with l stages). We assume that the crossbars are interconnected according to the spider-web pattern, whereby two diverging paths reconverge only after at least k stages. We assume that each vertex is independently idle with probability q, the vacancy probability. We assume that $b\ge2$ and the vacancy probability q are fixed, and that k and $l=ck$ tend to infinity with ratio a fixed constant $c > 1$. We consider the linking probability Q (the probability that there exists at least one idle path between a given idle input and a given idle output). In a previous paper [Discrete Appl. Math., 37/38 (1992), pp. 437-450] it was shown that if $c\le2$, then the linking probability Q tends to 0 if $0 < q < q_c$ (where $q_c=1/b^{(c-1)/c}$ is the critical vacancy probability) and tends to $(1-\xi)^2$ (where $\xi$ is the unique solution of the equation $\bigl(1-q(1-x)\bigr)^b=x$ in the range $0 < x < 1$) if $q_c < q < 1$. In this paper we extend this result to all rational $c > 1$. This is done by using generating functions and complex-variable techniques to estimate the second moments of various random variables involved in the analysis of the networks.

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)0.002
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: none
GenreCandidate signal: Empirical · Consensus signal: none
Teacher disagreement score0.967
Threshold uncertainty score0.410

Codex and Gemma teacher scores by category

CategoryCodexGemma
Metaresearch0.0020.000
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 head0.014
GPT teacher head0.236
Teacher spread0.221 · 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