Pith Number

pith:OPTSRKXY

pith:2009:OPTSRKXYEF4LMYR6HAMP7STNKQ

not attested not anchored not stored refs pending

Computing Geodesic Distances in Tree Space

Megan Owen

arxiv:0903.0696 v2 · 2009-03-04 · math.CO · cs.CG · cs.DM · math.MG · q-bio.PE

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{OPTSRKXYEF4LMYR6HAMP7STNKQ}

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	2026-05-18T04:20:36.048213Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

73e728aaf82178b6623e3818ffca6d542400746d39a37a760506ac21cbc6c4be

Aliases

arxiv: 0903.0696 · arxiv_version: 0903.0696v2 · doi: 10.48550/arxiv.0903.0696 · pith_short_12: OPTSRKXYEF4L · pith_short_16: OPTSRKXYEF4LMYR6 · pith_short_8: OPTSRKXY

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/OPTSRKXYEF4LMYR6HAMP7STNKQ \
  | 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: 73e728aaf82178b6623e3818ffca6d542400746d39a37a760506ac21cbc6c4be

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "39f7e0afba83941653d0ae6e2c9e30639d7d570a286317c0ed3bcf8b84c5e83a",
    "cross_cats_sorted": [
      "cs.CG",
      "cs.DM",
      "math.MG",
      "q-bio.PE"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2009-03-04T04:57:00Z",
    "title_canon_sha256": "943fcbdf4c254fff81a91dafa2ccfa53941f1139919d77eedd2eb9552adb9f7e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0903.0696",
    "kind": "arxiv",
    "version": 2
  }
}