Pith Number

pith:C3DBTTWU

pith:2009:C3DBTTWUCZIG3DNE7G5C7WG5OY

not attested not anchored not stored refs pending

Non-projectability of polytope skeleta

Raman Sanyal, Thilo R\"orig

arxiv:0908.0845 v1 · 2009-08-06 · math.MG · math.CO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{C3DBTTWUCZIG3DNE7G5C7WG5OY}

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	2026-05-18T03:36:06.783214Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

16c619ced416506d8da4f9ba2fd8dd760ca53197f7115161bf58a999a71111d4

Aliases

arxiv: 0908.0845 · arxiv_version: 0908.0845v1 · doi: 10.48550/arxiv.0908.0845 · pith_short_12: C3DBTTWUCZIG · pith_short_16: C3DBTTWUCZIG3DNE · pith_short_8: C3DBTTWU

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/C3DBTTWUCZIG3DNE7G5C7WG5OY \
  | 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: 16c619ced416506d8da4f9ba2fd8dd760ca53197f7115161bf58a999a71111d4

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "3e24e647821e6424991197db37b7ba0d9d89ce7f464a4daf838c8c2fb13f9f92",
    "cross_cats_sorted": [
      "math.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.MG",
    "submitted_at": "2009-08-06T16:28:16Z",
    "title_canon_sha256": "0d544471491e7883c63a642fbb22fd8200f14c27cf31da8b3b52d92bba4325a9"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0908.0845",
    "kind": "arxiv",
    "version": 1
  }
}