Pith Number

pith:7CHVDRWI

pith:2015:7CHVDRWIZ27777NDWZICOZCIEN

not attested not anchored not stored refs pending

Monetization as a Motivator for the Freemium Educational Platform Growth

Alex A. Volinsky, Anna Y. Prasikova, Ilya V. Osipov

arxiv:1501.04157 v1 · 2015-01-17 · cs.CY · cs.HC

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{7CHVDRWIZ27777NDWZICOZCIEN}

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	2026-05-18T02:29:09.884883Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f88f51c6c8cebffffda3b65027644823473452f2e21ebfd6767f8a7b0a2c6c79

Aliases

arxiv: 1501.04157 · arxiv_version: 1501.04157v1 · doi: 10.48550/arxiv.1501.04157 · pith_short_12: 7CHVDRWIZ277 · pith_short_16: 7CHVDRWIZ27777ND · pith_short_8: 7CHVDRWI

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/7CHVDRWIZ27777NDWZICOZCIEN \
  | 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: f88f51c6c8cebffffda3b65027644823473452f2e21ebfd6767f8a7b0a2c6c79

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "690ddcc6d331ddbe8145d64db9e518e15fab8d7d2e8451d0f0830600f395aa54",
    "cross_cats_sorted": [
      "cs.HC"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CY",
    "submitted_at": "2015-01-17T05:03:42Z",
    "title_canon_sha256": "b41387b2b38e87564f223e7ac69b54f65d3b0f8be34c32bb087bcc59090a8a37"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1501.04157",
    "kind": "arxiv",
    "version": 1
  }
}