Pith Number

pith:Q45GQEUT

pith:2026:Q45GQEUT3JKR4VWDJGOWOQYCUG

not attested not anchored not stored refs pending

A curvature-based criterion for harmonic circadian waveforms

Hiroshi Ito, Ryoya Fukasaku, Yusuke Yamada, Yutaro Kabata

arxiv:2608.02562 v1 · 2026-08-03 · q-bio.QM

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{Q45GQEUT3JKR4VWDJGOWOQYCUG}

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	2026-08-04T02:44:07.272455Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

873a681293da551e56c3499d674302a1aef78fdf265fc3eec18649fcd9bf1d3d

Aliases

arxiv: 2608.02562 · arxiv_version: 2608.02562v1 · doi: 10.48550/arxiv.2608.02562 · pith_short_12: Q45GQEUT3JKR · pith_short_16: Q45GQEUT3JKR4VWD · pith_short_8: Q45GQEUT

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/Q45GQEUT3JKR4VWDJGOWOQYCUG \
  | 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: 873a681293da551e56c3499d674302a1aef78fdf265fc3eec18649fcd9bf1d3d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "965ff174eaba0749969832c245f765c8d6b06de366d0c30f0d653a5e01d5f658",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "q-bio.QM",
    "submitted_at": "2026-08-03T17:43:58Z",
    "title_canon_sha256": "9f350f01e935fc7ebc06f78fbd06dc4ca5f8a78c0d3b15b3d8e17d9950a31a3b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2608.02562",
    "kind": "arxiv",
    "version": 1
  }
}