Pith Number

pith:7IXCYQJ5

pith:2014:7IXCYQJ5FNOAACTBJSITGXPSAC

not attested not anchored not stored refs pending

Proper base change for separated locally proper maps

Olaf M. Schn\"urer, Wolfgang Soergel

arxiv:1404.7630 v2 · 2014-04-30 · math.AT · math.AG · math.GN

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{7IXCYQJ5FNOAACTBJSITGXPSAC}

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	2026-05-18T02:38:36.980006Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

fa2e2c413d2b5c000a614c91335df20092456c23e87b5dc50a4105637471f1ba

Aliases

arxiv: 1404.7630 · arxiv_version: 1404.7630v2 · doi: 10.48550/arxiv.1404.7630 · pith_short_12: 7IXCYQJ5FNOA · pith_short_16: 7IXCYQJ5FNOAACTB · pith_short_8: 7IXCYQJ5

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/7IXCYQJ5FNOAACTBJSITGXPSAC \
  | 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: fa2e2c413d2b5c000a614c91335df20092456c23e87b5dc50a4105637471f1ba

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "371ae46d12d1536089096b29822ec3a1c348c65ccc49a24e87bbbd79cf0228ef",
    "cross_cats_sorted": [
      "math.AG",
      "math.GN"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AT",
    "submitted_at": "2014-04-30T08:35:41Z",
    "title_canon_sha256": "edc27f0ecf13b7d031d803495b50639a3e889c24099f518c240f1dd9e54c4336"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1404.7630",
    "kind": "arxiv",
    "version": 2
  }
}