Pith Number

pith:B7JUM5OH

pith:2015:B7JUM5OHPZYYHXHL6XOL76T3M2

not attested not anchored not stored refs pending

Non-wellfounded trees in Homotopy Type Theory

Benedikt Ahrens, Paolo Capriotti, R\'egis Spadotti

arxiv:1504.02949 v1 · 2015-04-12 · cs.LO · math.CT

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{B7JUM5OHPZYYHXHL6XOL76T3M2}

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	2026-05-17T23:40:42.211019Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0fd34675c77e7183dcebf5dcbffa7b66a27f0a6871a5d62433b36b447448ad8e

Aliases

arxiv: 1504.02949 · arxiv_version: 1504.02949v1 · doi: 10.48550/arxiv.1504.02949 · pith_short_12: B7JUM5OHPZYY · pith_short_16: B7JUM5OHPZYYHXHL · pith_short_8: B7JUM5OH

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/B7JUM5OHPZYYHXHL6XOL76T3M2 \
  | 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: 0fd34675c77e7183dcebf5dcbffa7b66a27f0a6871a5d62433b36b447448ad8e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0f9d5aef345af7524016274e5f1afeb265fb69469bad7019dc7c3facda9286b4",
    "cross_cats_sorted": [
      "math.CT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.LO",
    "submitted_at": "2015-04-12T09:36:07Z",
    "title_canon_sha256": "0567533cbbb8bcaf9bf72afc24f5d0a2f69008515a33fba663476c6f627d7860"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1504.02949",
    "kind": "arxiv",
    "version": 1
  }
}