Pith Number

pith:EXW3RHFJ

pith:2017:EXW3RHFJN333ZZYPPX5R6X4AG3

not attested not anchored not stored refs pending

Rational homotopy theory via Sullivan models: a survey

Steve Halperin, Yves F\'elix

arxiv:1708.05245 v1 · 2017-08-17 · 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{EXW3RHFJN333ZZYPPX5R6X4AG3}

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	2026-05-18T00:37:53.486385Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

25edb89ca96ef7bce70f7dfb1f5f8036e87de7dc7fc12c723e266e11dddcf23b

Aliases

arxiv: 1708.05245 · arxiv_version: 1708.05245v1 · doi: 10.48550/arxiv.1708.05245 · pith_short_12: EXW3RHFJN333 · pith_short_16: EXW3RHFJN333ZZYP · pith_short_8: EXW3RHFJ

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/EXW3RHFJN333ZZYPPX5R6X4AG3 \
  | 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: 25edb89ca96ef7bce70f7dfb1f5f8036e87de7dc7fc12c723e266e11dddcf23b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b591bef0ccce0f112308a485e6e045a972605781862a95c3c873dd3459e38d6c",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AT",
    "submitted_at": "2017-08-17T12:53:49Z",
    "title_canon_sha256": "d43a8b371280592aee742dc7ad64703fd662ae14d38e9a33344552c037c0b2d0"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1708.05245",
    "kind": "arxiv",
    "version": 1
  }
}