Pith Number

pith:FGK3WUD3

pith:2008:FGK3WUD3UNDJJUHXFZF73E4ISO

not attested not anchored not stored refs pending

On the chain-level intersection pairing for PL pseudomanifolds

Greg Friedman

arxiv:0808.1749 v1 · 2008-08-12 · math.GT · math.AT

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{FGK3WUD3UNDJJUHXFZF73E4ISO}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more · Embed verified badge

Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Receipt and verification

First computed	2026-05-18T04:25:28.849687Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2995bb507ba34694d0f72e4bfd9388938fa13bce13cb8dc80b22e12dbab1b536

Aliases

arxiv: 0808.1749 · arxiv_version: 0808.1749v1 · doi: 10.48550/arxiv.0808.1749 · pith_short_12: FGK3WUD3UNDJ · pith_short_16: FGK3WUD3UNDJJUHX · pith_short_8: FGK3WUD3

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/FGK3WUD3UNDJJUHXFZF73E4ISO \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: 2995bb507ba34694d0f72e4bfd9388938fa13bce13cb8dc80b22e12dbab1b536

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2ee03926a89f4f56493103daaaefb2f59406f6b2a04934f98cda57ecdc118ef4",
    "cross_cats_sorted": [
      "math.AT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.GT",
    "submitted_at": "2008-08-12T22:54:36Z",
    "title_canon_sha256": "9314f0c22ac74b58688d879240479d7a967f5c42893da8bbb5b2d8ee6de88e46"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0808.1749",
    "kind": "arxiv",
    "version": 1
  }
}