Pith Number

pith:FA7RSLI2

pith:2015:FA7RSLI2JLVZQ6RM24QAMGQ7D4

not attested not anchored not stored refs pending

Pretty rational models for Poincar\'e duality pairs

Donald Stanley, Hector Cordova Bulens, Pascal Lambrechts

arxiv:1505.04818 v1 · 2015-05-18 · 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{FA7RSLI2JLVZQ6RM24QAMGQ7D4}

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	2026-05-17T23:54:11.961015Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

283f192d1a4aeb987a2cd720061a1f1f38de07d0bb6cb75587a66ae5ecb1cd9c

Aliases

arxiv: 1505.04818 · arxiv_version: 1505.04818v1 · doi: 10.48550/arxiv.1505.04818 · pith_short_12: FA7RSLI2JLVZ · pith_short_16: FA7RSLI2JLVZQ6RM · pith_short_8: FA7RSLI2

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/FA7RSLI2JLVZQ6RM24QAMGQ7D4 \
  | 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: 283f192d1a4aeb987a2cd720061a1f1f38de07d0bb6cb75587a66ae5ecb1cd9c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "26a8c1e7320d1df10a4148c5d80de8489894e4d5e61e2bdf387e4c67482f666b",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AT",
    "submitted_at": "2015-05-18T21:01:46Z",
    "title_canon_sha256": "6ff396ffbeb0e84e0d7d90d82cf7bf5e6b8f95554cad2666f4abe2fc72b2c9e3"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1505.04818",
    "kind": "arxiv",
    "version": 1
  }
}