Pith Number

pith:IJFDZTX5

pith:2025:IJFDZTX5Y4O5FXF6ICZ5PB64F6

not attested not anchored not stored refs pending

Graph parameters that are coarsely equivalent to tree-length

Feodor F. Dragan

arxiv:2502.00951 v1 · 2025-02-02 · math.CO · cs.DS

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{IJFDZTX5Y4O5FXF6ICZ5PB64F6}

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	2026-07-05T10:08:40.628838Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

424a3ccefdc71dd2dcbe40b3d787dc2faeea9c41ab306dd5427c757583c6eea4

Aliases

arxiv: 2502.00951 · arxiv_version: 2502.00951v1 · doi: 10.48550/arxiv.2502.00951 · pith_short_12: IJFDZTX5Y4O5 · pith_short_16: IJFDZTX5Y4O5FXF6 · pith_short_8: IJFDZTX5

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/IJFDZTX5Y4O5FXF6ICZ5PB64F6 \
  | 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: 424a3ccefdc71dd2dcbe40b3d787dc2faeea9c41ab306dd5427c757583c6eea4

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "218161fd12dc726c2b0f23269dad0e1dee9867e6a62465685cdc00f53c857435",
    "cross_cats_sorted": [
      "cs.DS"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2025-02-02T23:05:26Z",
    "title_canon_sha256": "6802b05713eccdf122093b425264ca033e7a93fc18cebc3bb913b0da06878b3b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2502.00951",
    "kind": "arxiv",
    "version": 1
  }
}