Pith Number

pith:DBV5KJ5W

pith:1998:DBV5KJ5W3YEX3AAYMDKLWMHW2O

not attested not anchored not stored refs pending

On the signature of certain intersection forms

Feng Xu

arxiv:math/9803045 v1 · 1998-03-11 · 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{DBV5KJ5W3YEX3AAYMDKLWMHW2O}

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	2026-05-18T01:38:22.931835Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

186bd527b6de097d801860d4bb30f6d38fa89b0c89c95bf2f3512ccbe6dd9557

Aliases

arxiv: math/9803045 · arxiv_version: math/9803045v1 · doi: 10.48550/arxiv.math/9803045 · pith_short_12: DBV5KJ5W3YEX · pith_short_16: DBV5KJ5W3YEX3AAY · pith_short_8: DBV5KJ5W

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/DBV5KJ5W3YEX3AAYMDKLWMHW2O \
  | 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: 186bd527b6de097d801860d4bb30f6d38fa89b0c89c95bf2f3512ccbe6dd9557

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d043ace8698b08acddb94bfd34dca551c563ca34a6880be61df28df1211ac703",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "math.QA",
    "submitted_at": "1998-03-11T21:17:54Z",
    "title_canon_sha256": "11338308c1ec776e504bda3a78d23642c3c7efecd8058e8ef39b218d791ac041"
  },
  "schema_version": "1.0",
  "source": {
    "id": "math/9803045",
    "kind": "arxiv",
    "version": 1
  }
}