Pith Number

pith:NBHL7WL6

pith:2019:NBHL7WL6NAAQJU2VNYK4WWW2GI

not attested not anchored not stored refs pending

A spectral graph theoretic study of predator-prey networks

Shashankaditya Upadhyay, Sudeepto Bhattacharya

arxiv:1901.02883 v1 · 2019-01-09 · 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{NBHL7WL6NAAQJU2VNYK4WWW2GI}

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	2026-05-17T23:56:36.108126Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

684ebfd97e680104d3556e15cb5ada32022fd292c77cce4786f51e3d1e0b2c26

Aliases

arxiv: 1901.02883 · arxiv_version: 1901.02883v1 · doi: 10.48550/arxiv.1901.02883 · pith_short_12: NBHL7WL6NAAQ · pith_short_16: NBHL7WL6NAAQJU2V · pith_short_8: NBHL7WL6

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/NBHL7WL6NAAQJU2VNYK4WWW2GI \
  | 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: 684ebfd97e680104d3556e15cb5ada32022fd292c77cce4786f51e3d1e0b2c26

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "309657336827a7c78fdb5aba1d11e85adabca65fb57d8936c2f077b422238d64",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "q-bio.PE",
    "submitted_at": "2019-01-09T11:39:15Z",
    "title_canon_sha256": "5ecef3d0461075ec5a11cfb9578b991118b9de2430044214b5f06242b03e10b9"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1901.02883",
    "kind": "arxiv",
    "version": 1
  }
}