Pith Number

pith:X6TPZFIW

pith:2016:X6TPZFIWC72IJ2HSBWEY3QHWMO

not attested not anchored not stored refs pending

A little bit of extra functoriality for Ext and the computation of the Gerstenhaber bracket

Mariano Su\'arez-\'Alvarez

arxiv:1604.06507 v1 · 2016-04-21 · 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{X6TPZFIWC72IJ2HSBWEY3QHWMO}

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	2026-05-18T00:09:31.582035Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

bfa6fc951617f484e8f20d898dc0f663a5f8125c2add756a686f5e2cea7e7ccc

Aliases

arxiv: 1604.06507 · arxiv_version: 1604.06507v1 · doi: 10.48550/arxiv.1604.06507 · pith_short_12: X6TPZFIWC72I · pith_short_16: X6TPZFIWC72IJ2HS · pith_short_8: X6TPZFIW

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/X6TPZFIWC72IJ2HSBWEY3QHWMO \
  | 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: bfa6fc951617f484e8f20d898dc0f663a5f8125c2add756a686f5e2cea7e7ccc

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "bf13b3bd1cf0acf153659162bcb9630ea4ef47f67b5be95550ad285534f322d3",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.KT",
    "submitted_at": "2016-04-21T22:08:19Z",
    "title_canon_sha256": "ab1a072e121dca657005ae7165e56a243aec3a7506c9c0c40df81e8f0c650621"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1604.06507",
    "kind": "arxiv",
    "version": 1
  }
}