Pith Number

pith:IWNC7RVT

pith:2016:IWNC7RVTYMNGP3NWFUFGD5JKYE

not attested not anchored not stored refs pending

Chain Reduction Preserves the Unrooted Subtree Prune-and-Regraft Distance

Chris Whidden, Frederick A. Matsen IV

arxiv:1611.02351 v1 · 2016-11-08 · cs.DM

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{IWNC7RVTYMNGP3NWFUFGD5JKYE}

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	2026-05-18T00:59:52.330222Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

459a2fc6b3c31a67edb62d0a61f52ac1226864911a4d843b950f5250cb170c60

Aliases

arxiv: 1611.02351 · arxiv_version: 1611.02351v1 · doi: 10.48550/arxiv.1611.02351 · pith_short_12: IWNC7RVTYMNG · pith_short_16: IWNC7RVTYMNGP3NW · pith_short_8: IWNC7RVT

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/IWNC7RVTYMNGP3NWFUFGD5JKYE \
  | 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: 459a2fc6b3c31a67edb62d0a61f52ac1226864911a4d843b950f5250cb170c60

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "cd5e2ccd18524142b6ba4046cc69065e42ba30a7d86fe3d924ae0a3ebb4f5e63",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DM",
    "submitted_at": "2016-11-08T00:42:01Z",
    "title_canon_sha256": "338d1871f3199f4c2403f005af995098808248debbb435e753999ca865d30198"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1611.02351",
    "kind": "arxiv",
    "version": 1
  }
}