Pith Number

pith:4ULAPZ6T

pith:2022:4ULAPZ6TK2SRUVYXMT5X2R22IB

not attested not anchored not stored refs pending

Comparing the efficiency of forward and backward contact tracing

Jonas L. Juul, Steven H. Strogatz

arxiv:2206.15080 v1 · 2022-06-30 · q-bio.PE · physics.soc-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{4ULAPZ6TK2SRUVYXMT5X2R22IB}

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	2026-07-05T04:36:25.019116Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e51607e7d356a51a571764fb7d475a405146e3d893ea4af7bfc1fd9671890fef

Aliases

arxiv: 2206.15080 · arxiv_version: 2206.15080v1 · doi: 10.48550/arxiv.2206.15080 · pith_short_12: 4ULAPZ6TK2SR · pith_short_16: 4ULAPZ6TK2SRUVYX · pith_short_8: 4ULAPZ6T

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/4ULAPZ6TK2SRUVYXMT5X2R22IB \
  | 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: e51607e7d356a51a571764fb7d475a405146e3d893ea4af7bfc1fd9671890fef

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "375696a2241ba1b104a37481b00c7f7945f5255699513fb07f873628d0419f33",
    "cross_cats_sorted": [
      "physics.soc-ph"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "q-bio.PE",
    "submitted_at": "2022-06-30T07:28:10Z",
    "title_canon_sha256": "1ee900be668d89469f94c353ef01713199f307dd5b1c6b78eb6a0630036f33fd"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2206.15080",
    "kind": "arxiv",
    "version": 1
  }
}