Pith Number

pith:AYFZDQKK

pith:2013:AYFZDQKKFRSMDH57T5ZQ3VD6CY

not attested not anchored not stored refs pending

Predicting the ancestral character changes in a tree is typically easier than predicting the root state

Mike Steel, Olivier Gascuel

arxiv:1309.0926 v1 · 2013-09-04 · 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{AYFZDQKKFRSMDH57T5ZQ3VD6CY}

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	2026-05-18T03:14:16.432942Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

060b91c14a2c64c19fbf9f730dd47e16307277bcd7671a814a3e9b49265410c5

Aliases

arxiv: 1309.0926 · arxiv_version: 1309.0926v1 · doi: 10.48550/arxiv.1309.0926 · pith_short_12: AYFZDQKKFRSM · pith_short_16: AYFZDQKKFRSMDH57 · pith_short_8: AYFZDQKK

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/AYFZDQKKFRSMDH57T5ZQ3VD6CY \
  | 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: 060b91c14a2c64c19fbf9f730dd47e16307277bcd7671a814a3e9b49265410c5

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "61c6ba85472283410639405b3093c63d425eceabde3b2bd211609702e131ef89",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "q-bio.PE",
    "submitted_at": "2013-09-04T06:36:01Z",
    "title_canon_sha256": "b10f16c5bb414af3b5e2d115f0e50349f7627d5851e0490cf10df5429524da85"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1309.0926",
    "kind": "arxiv",
    "version": 1
  }
}