Pith Number

pith:FZRY247O

pith:2019:FZRY247O43UYGCUTFG2I5TRPMG

not attested not anchored not stored refs pending

Aspherical completions and rationally inert elements

Steve Halperin, Yves Felix

arxiv:1904.08714 v1 · 2019-04-18 · math.AT

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{FZRY247O43UYGCUTFG2I5TRPMG}

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	2026-05-17T23:48:13.265428Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2e638d73eee6e9830a9329b48ece2f618f98426b5809182a3863f0170d4ad192

Aliases

arxiv: 1904.08714 · arxiv_version: 1904.08714v1 · doi: 10.48550/arxiv.1904.08714 · pith_short_12: FZRY247O43UY · pith_short_16: FZRY247O43UYGCUT · pith_short_8: FZRY247O

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/FZRY247O43UYGCUTFG2I5TRPMG \
  | 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: 2e638d73eee6e9830a9329b48ece2f618f98426b5809182a3863f0170d4ad192

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "32f4123ed13dc6419676f005d0145f9b53d6cb4c29275259d7c151cb01ae27e8",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AT",
    "submitted_at": "2019-04-18T12:03:57Z",
    "title_canon_sha256": "0a4423b72ec342ebdc7a40d69be0e193e9f4e086038f11b6612bef750ba09aeb"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1904.08714",
    "kind": "arxiv",
    "version": 1
  }
}