Pith Number

pith:TF56PMJW

pith:2015:TF56PMJWECJQOEOE6Q2BG3G5TJ

not attested not anchored not stored refs pending

Calculating the Unrooted Subtree Prune-and-Regraft Distance

Chris Whidden, Frederick A. Matsen IV

arxiv:1511.07529 v3 · 2015-11-24 · cs.DS · 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{TF56PMJWECJQOEOE6Q2BG3G5TJ}

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	2026-05-18T00:31:22.740234Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

997be7b13620930711c4f434136cdd9a4f5f61c1ded66570d5d03fc46078b14e

Aliases

arxiv: 1511.07529 · arxiv_version: 1511.07529v3 · doi: 10.48550/arxiv.1511.07529 · pith_short_12: TF56PMJWECJQ · pith_short_16: TF56PMJWECJQOEOE · pith_short_8: TF56PMJW

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/TF56PMJWECJQOEOE6Q2BG3G5TJ \
  | 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: 997be7b13620930711c4f434136cdd9a4f5f61c1ded66570d5d03fc46078b14e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "373f87077566a55eef557eb86b6308b5986eeedc2589bfc7b550b2d83afabab9",
    "cross_cats_sorted": [
      "q-bio.PE"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DS",
    "submitted_at": "2015-11-24T01:15:51Z",
    "title_canon_sha256": "3ca5e398dde1cb131f689e13e98c7688529cb3df589da463e4284432e70fd80f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1511.07529",
    "kind": "arxiv",
    "version": 3
  }
}