Pith Number

pith:3QHUAM6J

pith:2007:3QHUAM6JOZGJCHENAU7ATRN5WO

not attested not anchored not stored refs pending

The sphericity of the complex of non-degenerate subspaces

Alice Devillers, Bernhard Muhlherr, Ralf K\"ohl

arxiv:0711.3468 v3 · 2007-11-21 · math.CO · math.GR

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{3QHUAM6JOZGJCHENAU7ATRN5WO}

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	2026-05-18T02:20:20.315165Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

dc0f4033c9764c911c8d053e09c5bdb39552c8b3f92e83def7d8d8a125bc0b61

Aliases

arxiv: 0711.3468 · arxiv_version: 0711.3468v3 · doi: 10.48550/arxiv.0711.3468 · pith_short_12: 3QHUAM6JOZGJ · pith_short_16: 3QHUAM6JOZGJCHEN · pith_short_8: 3QHUAM6J

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/3QHUAM6JOZGJCHENAU7ATRN5WO \
  | 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: dc0f4033c9764c911c8d053e09c5bdb39552c8b3f92e83def7d8d8a125bc0b61

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "937acc750f2252d82d39ea157304a6fcfaf856a1908a37e45333f89e5c107454",
    "cross_cats_sorted": [
      "math.GR"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2007-11-21T21:55:17Z",
    "title_canon_sha256": "eff3b44cef2a296fe697f13dc82b0dfaa5accc7285de81e4f7562219317bdf9e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0711.3468",
    "kind": "arxiv",
    "version": 3
  }
}