Pith Number

pith:4CAMG3N5

pith:2015:4CAMG3N5TPOZXLZMOTJYKXEQA7

not attested not anchored not stored refs pending

Donor Retention in Online Crowdfunding Communities: A Case Study of DonorsChoose.org

Jure Leskovec, Tim Althoff

arxiv:1503.02729 v1 · 2015-03-09 · cs.CY · cs.SI

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{4CAMG3N5TPOZXLZMOTJYKXEQA7}

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	2026-05-18T02:25:13.266642Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e080c36dbd9bdd9baf2c74d3855c9007d6008c99ce709231865e9be74cbc7785

Aliases

arxiv: 1503.02729 · arxiv_version: 1503.02729v1 · doi: 10.48550/arxiv.1503.02729 · pith_short_12: 4CAMG3N5TPOZ · pith_short_16: 4CAMG3N5TPOZXLZM · pith_short_8: 4CAMG3N5

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/4CAMG3N5TPOZXLZMOTJYKXEQA7 \
  | 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: e080c36dbd9bdd9baf2c74d3855c9007d6008c99ce709231865e9be74cbc7785

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b81d6b32030fb237c5614d9c33a215b39dbf7d7bdd3a638af52929810c63eb29",
    "cross_cats_sorted": [
      "cs.SI"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CY",
    "submitted_at": "2015-03-09T23:16:34Z",
    "title_canon_sha256": "c8be9245f2fa7387af842c6e6ebeb9d80d9b5229e9bec5f583de103722b3e113"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1503.02729",
    "kind": "arxiv",
    "version": 1
  }
}