Pith Number

pith:DFA5OM4V

pith:2015:DFA5OM4VNS5XAQWR55WTO2IYHW

not attested not anchored not stored refs pending

The Ehresmann-Schein-Nambooripad Theorem for Inverse Categories

Darien DeWolf, Dorette Pronk

arxiv:1507.08615 v2 · 2015-07-30 · math.RA · math.CT

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{DFA5OM4VNS5XAQWR55WTO2IYHW}

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	2026-05-18T00:31:31.819438Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

1941d733956cbb7042d1ef6d3769183daedbca89b6e2dc415ebd78d967e3fb1b

Aliases

arxiv: 1507.08615 · arxiv_version: 1507.08615v2 · doi: 10.48550/arxiv.1507.08615 · pith_short_12: DFA5OM4VNS5X · pith_short_16: DFA5OM4VNS5XAQWR · pith_short_8: DFA5OM4V

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/DFA5OM4VNS5XAQWR55WTO2IYHW \
  | 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: 1941d733956cbb7042d1ef6d3769183daedbca89b6e2dc415ebd78d967e3fb1b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "bb3fff4366c830c81c157e33c62e314fc7049c0a278553e5699f256fba1ba643",
    "cross_cats_sorted": [
      "math.CT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.RA",
    "submitted_at": "2015-07-30T18:25:22Z",
    "title_canon_sha256": "003247b5ca36cfbd291c6a3a1719f19d5d3d522271d87fe7c4b8cc881f54eace"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1507.08615",
    "kind": "arxiv",
    "version": 2
  }
}