Pith Number

pith:SEMLA3BH

pith:2011:SEMLA3BHF7LH7CLY7S4XOTCHVT

not attested not anchored not stored refs pending

The Herbrand Topos

Benno van den Berg

arxiv:1112.3837 v3 · 2011-12-16 · math.CT · 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{SEMLA3BHF7LH7CLY7S4XOTCHVT}

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	2026-05-18T03:27:42.956045Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

9118b06c272fd67f8978fcb9774c47acc89af55126ea76a870c54515f283c15d

Aliases

arxiv: 1112.3837 · arxiv_version: 1112.3837v3 · doi: 10.48550/arxiv.1112.3837 · pith_short_12: SEMLA3BHF7LH · pith_short_16: SEMLA3BHF7LH7CLY · pith_short_8: SEMLA3BH

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/SEMLA3BHF7LH7CLY7S4XOTCHVT \
  | 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: 9118b06c272fd67f8978fcb9774c47acc89af55126ea76a870c54515f283c15d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "6f0dd3eb7e3cc73e754e26af31ad4e89f8cda2b2ff8c7a123a67e10657688c37",
    "cross_cats_sorted": [
      "math.LO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CT",
    "submitted_at": "2011-12-16T14:55:41Z",
    "title_canon_sha256": "c34a03ff488da360682aa9ef899efb365fa4b1f2778274d6539922df8e27b314"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1112.3837",
    "kind": "arxiv",
    "version": 3
  }
}