Pith Number

pith:XB23IL2I

pith:2018:XB23IL2I3BG7HU3Q5B7S5MGRRS

not attested not anchored not stored refs pending

Size-Change Termination as a Contract

David Van Horn, Phuc C. Nguyen, Sam Tobin-Hochstadt, Thomas Gilray

arxiv:1808.02101 v2 · 2018-08-06 · cs.PL

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{XB23IL2I3BG7HU3Q5B7S5MGRRS}

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	2026-05-17T23:47:44.200629Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b875b42f48d84df3d370e87f2eb0d18c903401b6c604d1310a41edb128e36dff

Aliases

arxiv: 1808.02101 · arxiv_version: 1808.02101v2 · doi: 10.48550/arxiv.1808.02101 · pith_short_12: XB23IL2I3BG7 · pith_short_16: XB23IL2I3BG7HU3Q · pith_short_8: XB23IL2I

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/XB23IL2I3BG7HU3Q5B7S5MGRRS \
  | 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: b875b42f48d84df3d370e87f2eb0d18c903401b6c604d1310a41edb128e36dff

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "518d07c534a7b1b36a19a88d1f063e11ae84d29659787a25c305636a6c2a38c0",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "cs.PL",
    "submitted_at": "2018-08-06T20:41:56Z",
    "title_canon_sha256": "47a25c7be7aaa2ef99fac64c50177a759fa92352815a8bb585bb8533f5c65c7b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1808.02101",
    "kind": "arxiv",
    "version": 2
  }
}