Pith Number

pith:TBT2FHNE

pith:2010:TBT2FHNEJAPB472YRMCYZ5DKR6

not attested not anchored not stored refs pending

Reciprocity of mobile phone calls

Jari Saramaki, Kimmo Kaski, Lauri Kovanen

arxiv:1002.0763 v1 · 2010-02-03 · 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{TBT2FHNEJAPB472YRMCYZ5DKR6}

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.

Cited by

1 paper in Pith

Sorry for the late reply: Response times and reciprocity in WhatsApp and Instagram chats

Receipt and verification

First computed	2026-05-18T04:19:22.342763Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

9867a29da4481e1e7f588b058cf46a8f8b309f746756674a727bc0a05c2ad3a4

Aliases

arxiv: 1002.0763 · arxiv_version: 1002.0763v1 · doi: 10.48550/arxiv.1002.0763 · pith_short_12: TBT2FHNEJAPB · pith_short_16: TBT2FHNEJAPB472Y · pith_short_8: TBT2FHNE

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/TBT2FHNEJAPB472YRMCYZ5DKR6 \
  | 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: 9867a29da4481e1e7f588b058cf46a8f8b309f746756674a727bc0a05c2ad3a4

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "87bfb5b7f73f936fccd0c9c4ea87854820cfe982fa8015294781ba598f49bfd0",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.soc-ph",
    "submitted_at": "2010-02-03T15:44:24Z",
    "title_canon_sha256": "fa738b3ec3d4e5a369b2cd0a0bc4865ff1c2d758f81918da91c126d19d2b830f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1002.0763",
    "kind": "arxiv",
    "version": 1
  }
}