Pith Number

pith:S2GXM5H4

pith:1992:S2GXM5H4TPHZ65TKYSMMOAFBI7

not attested not anchored not stored refs pending

Embeddings of Iteration Trees

William Mitchell

arxiv:math/9204209 v1 · 1992-04-17 · math.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{S2GXM5H4TPHZ65TKYSMMOAFBI7}

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	2026-05-18T01:05:52.942183Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

968d7674fc9bcf9f766ac498c700a147c245674003a6ba828ac01ed2424f34bb

Aliases

arxiv: math/9204209 · arxiv_version: math/9204209v1 · doi: 10.48550/arxiv.math/9204209 · pith_short_12: S2GXM5H4TPHZ · pith_short_16: S2GXM5H4TPHZ65TK · pith_short_8: S2GXM5H4

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/S2GXM5H4TPHZ65TKYSMMOAFBI7 \
  | 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: 968d7674fc9bcf9f766ac498c700a147c245674003a6ba828ac01ed2424f34bb

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a1fe34728a4c520e34596e87c257c5dd8736355d58bdb73cc112e440351a7287",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "math.LO",
    "submitted_at": "1992-04-17T00:00:00Z",
    "title_canon_sha256": "7ddd4d879add07e7bfe106084a7e23ea7bd4630f281cc698b26b4410b05d44c7"
  },
  "schema_version": "1.0",
  "source": {
    "id": "math/9204209",
    "kind": "arxiv",
    "version": 1
  }
}