Pith Number

pith:OU3JFBZI

pith:2026:OU3JFBZIMUAHMAZWZKNQJJZDOE

not attested not anchored not stored refs pending

College closures from 2020 to 2025: An exploratory analysis and its implications for the enrollment cliff

Sepehr Akbari, Shahrzad Jamshidi

arxiv:2607.07917 v1 · 2026-07-08 · stat.AP

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{OU3JFBZIMUAHMAZWZKNQJJZDOE}

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	2026-07-10T00:19:04.781250Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

75369287286500760336ca9b04a7237136d7f24795d30b3489ad9f91fc3aed29

Aliases

arxiv: 2607.07917 · arxiv_version: 2607.07917v1 · doi: 10.48550/arxiv.2607.07917 · pith_short_12: OU3JFBZIMUAH · pith_short_16: OU3JFBZIMUAHMAZW · pith_short_8: OU3JFBZI

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/OU3JFBZIMUAHMAZWZKNQJJZDOE \
  | 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: 75369287286500760336ca9b04a7237136d7f24795d30b3489ad9f91fc3aed29

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8da94390e096fdd78881e122377913d561bd67bfa8783dcb9a34ce6150da5d26",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by-nc-nd/4.0/",
    "primary_cat": "stat.AP",
    "submitted_at": "2026-07-08T21:02:55Z",
    "title_canon_sha256": "e3dd3b23e2e8f5fd0904f72ef5ad9f1c233416bd8d3bbae1619ebd1fac720cbe"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2607.07917",
    "kind": "arxiv",
    "version": 1
  }
}