Pith Number

pith:UVTX6JVH

pith:2012:UVTX6JVHW5ERO6L6N6J54PYXKO

not attested not anchored not stored refs pending

On log surfaces

Hiromu Tanaka, Osamu Fujino

arxiv:1205.2464 v1 · 2012-05-11 · math.AG

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{UVTX6JVHW5ERO6L6N6J54PYXKO}

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	2026-05-18T03:55:55.455520Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a5677f26a7b74917797e6f93de3f17538897b44837b1db852fdeed4b7af76426

Aliases

arxiv: 1205.2464 · arxiv_version: 1205.2464v1 · doi: 10.48550/arxiv.1205.2464 · pith_short_12: UVTX6JVHW5ER · pith_short_16: UVTX6JVHW5ERO6L6 · pith_short_8: UVTX6JVH

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/UVTX6JVHW5ERO6L6N6J54PYXKO \
  | 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: a5677f26a7b74917797e6f93de3f17538897b44837b1db852fdeed4b7af76426

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a090efdac0585361fb29160df5954c37b3351a100cead43ccc6c1b2d654c1fbc",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2012-05-11T09:07:51Z",
    "title_canon_sha256": "390faabd2682f678a8a184ca591d825a84b34d490e1b4fa12ee730eca4b0d3c6"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1205.2464",
    "kind": "arxiv",
    "version": 1
  }
}