Pith Number

pith:FTLYNFTW

pith:2016:FTLYNFTWVJA7NREZJ3XCFCQS2B

not attested not anchored not stored refs pending

Division by zero

Emil Je\v{r}\'abek

arxiv:1604.07309 v3 · 2016-04-25 · math.LO · cs.LO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{FTLYNFTWVJA7NREZJ3XCFCQS2B}

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	2026-05-18T01:02:52.194671Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2cd7869676aa41f6c4994eee228a12d07fbab4086d46c21f4ffa4d5610126aa1

Aliases

arxiv: 1604.07309 · arxiv_version: 1604.07309v3 · doi: 10.48550/arxiv.1604.07309 · pith_short_12: FTLYNFTWVJA7 · pith_short_16: FTLYNFTWVJA7NREZ · pith_short_8: FTLYNFTW

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/FTLYNFTWVJA7NREZJ3XCFCQS2B \
  | 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: 2cd7869676aa41f6c4994eee228a12d07fbab4086d46c21f4ffa4d5610126aa1

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9fffb9173f100b923e68b9a745ad87a7a252ade65858147ce6f8ec4e5cd0cfc2",
    "cross_cats_sorted": [
      "cs.LO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.LO",
    "submitted_at": "2016-04-25T15:25:44Z",
    "title_canon_sha256": "2bc12460049627fb67d449ce2b2498de0af3468b901364ebe6bc03bfd6dc5656"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1604.07309",
    "kind": "arxiv",
    "version": 3
  }
}