Pith Number

pith:6RMW4ZB2

pith:2011:6RMW4ZB23RRFNQ3BGCLK5SDMBO

not attested not anchored not stored refs pending

A simple mathematical model of gradual Darwinian evolution: Emergence of a Gaussian trait distribution in adaptation along a fitness gradient

Vadim N. Biktashev

arxiv:1102.0272 v6 · 2011-02-01 · 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{6RMW4ZB23RRFNQ3BGCLK5SDMBO}

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	2026-05-18T02:55:36.715666Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f4596e643adc6256c3613096aec86c0b9fd338c52a9fe77e9aa276bfd9c43f08

Aliases

arxiv: 1102.0272 · arxiv_version: 1102.0272v6 · doi: 10.48550/arxiv.1102.0272 · pith_short_12: 6RMW4ZB23RRF · pith_short_16: 6RMW4ZB23RRFNQ3B · pith_short_8: 6RMW4ZB2

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/6RMW4ZB23RRFNQ3BGCLK5SDMBO \
  | 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: f4596e643adc6256c3613096aec86c0b9fd338c52a9fe77e9aa276bfd9c43f08

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c33a66bf24febb8f1785b561fd61b256a60e1c2be03dc87be5eacbe98225dde2",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "q-bio.PE",
    "submitted_at": "2011-02-01T20:46:54Z",
    "title_canon_sha256": "afa96d6d2de9bb226ba9ea5fc53a731ca07d29407f2457d3afcdf34f12f2cfdc"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1102.0272",
    "kind": "arxiv",
    "version": 6
  }
}