Pith Number

pith:2D24UYZ2

pith:2010:2D24UYZ2FKRHWXEBU4BDY3DZEO

not attested not anchored not stored refs pending

On Bifurcated supertasks and related questions

Antonio Leon

arxiv:1001.4224 v2 · 2010-01-24 · math.GM

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{2D24UYZ2FKRHWXEBU4BDY3DZEO}

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	2026-05-18T04:03:56.022752Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d0f5ca633a2aa27b5c81a7023c6c79238dccd00c9ad5d80708872fe1ed9c7eca

Aliases

arxiv: 1001.4224 · arxiv_version: 1001.4224v2 · doi: 10.48550/arxiv.1001.4224 · pith_short_12: 2D24UYZ2FKRH · pith_short_16: 2D24UYZ2FKRHWXEB · pith_short_8: 2D24UYZ2

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/2D24UYZ2FKRHWXEBU4BDY3DZEO \
  | 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: d0f5ca633a2aa27b5c81a7023c6c79238dccd00c9ad5d80708872fe1ed9c7eca

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "79bd2b13c4a9c0e2cd0e6ed8e2e36f4f9c1fff2ede609a4633102c002125d10c",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.GM",
    "submitted_at": "2010-01-24T07:28:26Z",
    "title_canon_sha256": "97234a327349f9d4493532ad9de62c64706c7b5d3a8475491870d87062c240d6"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1001.4224",
    "kind": "arxiv",
    "version": 2
  }
}