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GeezerVison is showing github.com — Fieldnote-Echo - Overview

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@Fieldnote-Echo
Fieldnote-Echo
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Nelson Spence Fieldnote-Echo

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Behavioral Health | Data Science | Formal Verification
109 followers · 126 following
  • @Project-Navi @Oxford-House-Inc
  • Dallas, TX
  • 14:08 (UTC -06:00)
  • https://theexhale.projectnavi.ai
  • https://orcid.org/0009-0008-3344-8297
  • in/nelson-spence

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@dleighsystem

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Achievement: StarstruckAchievement: Pull Sharkx3Achievement: Pair Extraordinairex4Achievement: QuickdrawAchievement: YOLO

Achievements

Achievement: StarstruckAchievement: Pull Sharkx3Achievement: Pair Extraordinairex4Achievement: QuickdrawAchievement: YOLO

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@Project-Navi @OpenHands
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Fieldnote-Echo/README.md

Hey, I'm Nelson.

OpenHands - Contributor Software Agent SDK - Contributor Mathlib - Contributor

I map failure patterns across complex systems and build the security boundaries required to stabilize them.

I'm the founder of Project Navi - an open-source AI security company focused on zero trust architecture and mathematical governance. Before that, I spent seven years in behavioral health research, coordinating peer-support programs across 500+ organizations and publishing on workforce collapse in the APA Psychiatric Rehabilitation Journal.

The same structural breakdowns I studied in human systems - drift under pressure, coherence loss at scale, collapse when governance is bolted on instead of built in - show up in AI deployments. So I started building infrastructure to prevent them.


What I'm Building

takens-formalization

Takens' theorem for generic pairs, machine-checked. On a compact smooth d-manifold, the pairs (T, h) of a C² diffeomorphism and a C² observation whose delay map with 2d+1 coordinates is a C² embedding are open and dense in Diff²(M) × C²(M, ℝ). Also finite-regularity Sard (via a port of Moreira's theorem), exact finite-state horizons and ordinal codes. Lean 4 + Mathlib v4.34.1; no sorry, standard axioms only.

fd-formalization

Box-counting dimension of the (u,v)-flowers, machine-checked. For 1 < u ≤ v, the Rozenfeld–Havlin–ben-Avraham flowers have dimension log(u+v)/log u: as the limit of their recurrences, as a log-ratio of the explicit graphs, and as a box-counting dimension over minimum box covers at every resolving scale. Lean 4 + Mathlib v4.34.1; no sorry, standard axioms only.

cd-formalization

Existence theory for the Creative Determinant boundary value problem −ΔΦ = a|∇Φ| + bΦ − c(Φ₊)ᵖ. On finite weighted graphs, a positive solution is fully proved; the continuum results are conditional on explicit, documented elliptic hypotheses. Lean 4 + Mathlib v4.34.1; standard axioms only. Theory in the paper.

navi-sanitize

Deterministic input sanitization for untrusted text in LLM pipelines. Strips homoglyphs, invisible Unicode, null bytes, template injection, and path traversal vectors. Zero dependencies. Python 3.12+. Live on PyPI.


Open Source Contributions

  • OpenHands: Disclosed a CVSS 9.1 security vulnerability; wrote and merged the fix into main. Contributed defense-in-depth SecurityAnalyzer ensemble.
  • Mathlib: Contributed SimpleGraph.ball (open metric ball).
  • NIST and NCCoE: Submitted responses on AI agent identity, authorization, and adversarial prompt detection (Zenodo).

Get In Touch

  • Security: [email protected]
  • Legal: [email protected]
  • PGP: /.well-known/pgp-key.txt (fingerprint: 402E C296 1A72 CBFF 63B8 FEE9 A42A 76A1 C696 FF08)
  • Sponsor my work: GitHub Sponsors

Machine cognition, human values.

The knowledge is free, the community is open. If you wish to support our mission, buy a t-shirt. 🐘

Pinned Loading

  1. Project-Navi/fd-formalization Project-Navi/fd-formalization Public

    Lean 4 + Mathlib proof that the (u,v)-flowers have dimension log(u+v)/log u: as a recurrence limit, as a log-ratio of the explicit graphs, and as a box-counting dimension at every resolving scale. …

    Lean 3

  2. Project-Navi/navi-sanitize Project-Navi/navi-sanitize Public

    Deterministic input sanitization for untrusted text — invisible characters, homoglyphs, and encoding tricks, handled before your code sees them. Zero dependencies, no ML. Python 3.12+.

    Python 3

  3. Project-Navi/takens-formalization Project-Navi/takens-formalization Public

    Lean 4 + Mathlib proof of Takens' theorem for generic pairs: C² delay embeddings with 2d+1 coordinates are open and dense in Diff²(M) × C²(M, ℝ). Also finite-regularity Sard. No sorry.

    Lean 3 1

  4. Project-Navi/cd-formalization Project-Navi/cd-formalization Public

    Lean 4 + Mathlib existence theory for the Creative Determinant boundary value problem: positive solutions fully proved on finite weighted graphs; continuum results conditional on explicit, document…

    Lean 2

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