Pith Number

pith:E37F7BBS

pith:2015:E37F7BBSKTN7AN67OBNGGZYK77

not attested not anchored not stored refs pending

The two out of three property in ind-categories and a convenient model category of spaces

Ilan Barnea

arxiv:1507.08709 v3 · 2015-07-31 · math.AT · math.CT · 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{E37F7BBSKTN7AN67OBNGGZYK77}

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	2026-05-18T01:01:00.519848Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

26fe5f843254dbf037df705a63670affd2ccaf4d3c359c64fba6a9fec49e8019

Aliases

arxiv: 1507.08709 · arxiv_version: 1507.08709v3 · doi: 10.48550/arxiv.1507.08709 · pith_short_12: E37F7BBSKTN7 · pith_short_16: E37F7BBSKTN7AN67 · pith_short_8: E37F7BBS

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/E37F7BBSKTN7AN67OBNGGZYK77 \
  | 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: 26fe5f843254dbf037df705a63670affd2ccaf4d3c359c64fba6a9fec49e8019

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8341be116d718eab096b1d89911db927dbabaeea2decafe9ad0ba00dc5b7c2fe",
    "cross_cats_sorted": [
      "math.CT",
      "math.GN"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AT",
    "submitted_at": "2015-07-31T00:07:47Z",
    "title_canon_sha256": "5fcda7e8265890d6194785bbc1d080c2b319df15609827a4557a63e5dd731e48"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1507.08709",
    "kind": "arxiv",
    "version": 3
  }
}