Pith Number

pith:EAQEVNLI

pith:2002:EAQEVNLIQW2SERC5VY4DE4ZQK4

not attested not anchored not stored refs pending

An invariant of link cobordisms from Khovanov homology

Magnus Jacobsson

arxiv:math/0206303 v2 · 2002-06-28 · math.GT · math.QA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{EAQEVNLIQW2SERC5VY4DE4ZQK4}

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	2026-05-18T02:41:32.972013Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

20204ab56885b522445dae38327330572c6a2439ce5dafb18be451135140addf

Aliases

arxiv: math/0206303 · arxiv_version: math/0206303v2 · doi: 10.48550/arxiv.math/0206303 · pith_short_12: EAQEVNLIQW2S · pith_short_16: EAQEVNLIQW2SERC5 · pith_short_8: EAQEVNLI

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/EAQEVNLIQW2SERC5VY4DE4ZQK4 \
  | 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: 20204ab56885b522445dae38327330572c6a2439ce5dafb18be451135140addf

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "602d97f43ea5747f398f4a19d2101b7fa320a57c2a06832e95eaf443e04f8afd",
    "cross_cats_sorted": [
      "math.QA"
    ],
    "license": "",
    "primary_cat": "math.GT",
    "submitted_at": "2002-06-28T08:25:39Z",
    "title_canon_sha256": "5d235c8bbad82df9e46a1d0aca1416b1f8c54f12340bc92b3ae9a599b878073a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "math/0206303",
    "kind": "arxiv",
    "version": 2
  }
}