Pith Number

pith:ISPBD53W

pith:2013:ISPBD53WE4RB3VWGDQIQIS6COB

not attested not anchored not stored refs pending

Numerical computations in cobordism categories

Carlos Segovia

arxiv:1307.2850 v1 · 2013-07-10 · 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{ISPBD53WE4RB3VWGDQIQIS6COB}

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	2026-05-18T03:18:50.267893Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

449e11f77627221dd6c61c11044bc27048705c7a54437037963ed5c619b3349b

Aliases

arxiv: 1307.2850 · arxiv_version: 1307.2850v1 · doi: 10.48550/arxiv.1307.2850 · pith_short_12: ISPBD53WE4RB · pith_short_16: ISPBD53WE4RB3VWG · pith_short_8: ISPBD53W

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/ISPBD53WE4RB3VWGDQIQIS6COB \
  | 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: 449e11f77627221dd6c61c11044bc27048705c7a54437037963ed5c619b3349b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f4066bcd1ce39ad99ff6cc97a5686bd96033af2fad4d9905a5666766dc39f9af",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AT",
    "submitted_at": "2013-07-10T16:48:06Z",
    "title_canon_sha256": "36ac99ee0a1cd8fffd4c1aacddc8c51b4e23a93747bb0c1061f5de8632816a92"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1307.2850",
    "kind": "arxiv",
    "version": 1
  }
}