Pith Number

pith:VFGXGQPJ

pith:2020:VFGXGQPJNJZZ2LGIZW7NL3CVYY

not attested not anchored not stored refs pending

Classifying sleep states using persistent homology and Markov chain: a Pilot Study

Giseon Heo, Kritika Singhal, Sarah Tymochko

arxiv:2002.07810 v1 · 2020-02-17 · q-bio.QM · eess.SP

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{VFGXGQPJNJZZ2LGIZW7NL3CVYY}

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	2026-07-05T00:42:24.170873Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a94d7341e96a739d2cc8cdbed5ec55c6162068b3f2d9b5af5cd8c125d9fd78fd

Aliases

arxiv: 2002.07810 · arxiv_version: 2002.07810v1 · doi: 10.48550/arxiv.2002.07810 · pith_short_12: VFGXGQPJNJZZ · pith_short_16: VFGXGQPJNJZZ2LGI · pith_short_8: VFGXGQPJ

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/VFGXGQPJNJZZ2LGIZW7NL3CVYY \
  | 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: a94d7341e96a739d2cc8cdbed5ec55c6162068b3f2d9b5af5cd8c125d9fd78fd

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "710f867781b8edb1b69ba0fa6930f273a60bce342394f1e3f4438689f90f7508",
    "cross_cats_sorted": [
      "eess.SP"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "q-bio.QM",
    "submitted_at": "2020-02-17T22:24:14Z",
    "title_canon_sha256": "d0c8771645d39179c6464c34204850e294fdf5f17929e64d13abf182fd8b41c1"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2002.07810",
    "kind": "arxiv",
    "version": 1
  }
}