Pith Number

pith:VST3Y7NR

pith:2011:VST3Y7NREZLEN3QM4XFDKAUQBG

not attested not anchored not stored refs pending

The cohomology of lambda-rings and Psi-rings

Michael Robinson

arxiv:1101.2976 v1 · 2011-01-15 · math.KT

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{VST3Y7NREZLEN3QM4XFDKAUQBG}

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	2026-05-18T04:31:30.648426Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

aca7bc7db1265646ee0ce5ca35029009a833f1de90250d36c123a56263bddaf0

Aliases

arxiv: 1101.2976 · arxiv_version: 1101.2976v1 · doi: 10.48550/arxiv.1101.2976 · pith_short_12: VST3Y7NREZLE · pith_short_16: VST3Y7NREZLEN3QM · pith_short_8: VST3Y7NR

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/VST3Y7NREZLEN3QM4XFDKAUQBG \
  | 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: aca7bc7db1265646ee0ce5ca35029009a833f1de90250d36c123a56263bddaf0

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ff0cce230391ac13a122b4ac4b6ee0008fd584f6089bcbfe166fbb13169d7adb",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.KT",
    "submitted_at": "2011-01-15T11:39:29Z",
    "title_canon_sha256": "4a3754d9bf6bfa8fc7f4104c8162ca57a9baee9d08908517eaf0dd054b840ca5"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1101.2976",
    "kind": "arxiv",
    "version": 1
  }
}