Pith Number

pith:DZKKHNSQ

pith:2018:DZKKHNSQQWHL6HKJ7HBSEBWB3V

not attested not anchored not stored refs pending

Strictures of the female reproductive tract impose fierce competition to select for highly motile sperm

Alireza Abbaspourrad, Gianpiero D.Palermo, Meisam Zaferani

arxiv:1808.07537 v1 · 2018-08-22 · physics.bio-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{DZKKHNSQQWHL6HKJ7HBSEBWB3V}

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	2026-05-18T00:07:27.037188Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

1e54a3b650858ebf1d49f9c32206c1dd6e2c3ed5d7fc29f68f10dee429041eee

Aliases

arxiv: 1808.07537 · arxiv_version: 1808.07537v1 · doi: 10.48550/arxiv.1808.07537 · pith_short_12: DZKKHNSQQWHL · pith_short_16: DZKKHNSQQWHL6HKJ · pith_short_8: DZKKHNSQ

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/DZKKHNSQQWHL6HKJ7HBSEBWB3V \
  | 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: 1e54a3b650858ebf1d49f9c32206c1dd6e2c3ed5d7fc29f68f10dee429041eee

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "12d011492821de0c48468340764546710d4be1a2196ba32f18b33038b180eee2",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.bio-ph",
    "submitted_at": "2018-08-22T19:34:24Z",
    "title_canon_sha256": "66d58bce259aff4f34fddc3ebf8b2980bdd3dd5f9c84f2af9a92bbb7afe09aa5"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1808.07537",
    "kind": "arxiv",
    "version": 1
  }
}