Pith Number

pith:7GBNRN3T

pith:2013:7GBNRN3TOTSJMM3PE6HI3IER5P

not attested not anchored not stored refs pending

A lightface analysis of the differentiability rank

Linda Brown Westrick

arxiv:1302.2975 v3 · 2013-02-13 · math.LO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{7GBNRN3TOTSJMM3PE6HI3IER5P}

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	2026-05-18T03:17:01.007546Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f982d8b77374e496336f278e8da091ebf835203682f173077d3859e1f5b10f86

Aliases

arxiv: 1302.2975 · arxiv_version: 1302.2975v3 · doi: 10.48550/arxiv.1302.2975 · pith_short_12: 7GBNRN3TOTSJ · pith_short_16: 7GBNRN3TOTSJMM3P · pith_short_8: 7GBNRN3T

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/7GBNRN3TOTSJMM3PE6HI3IER5P \
  | 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: f982d8b77374e496336f278e8da091ebf835203682f173077d3859e1f5b10f86

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c1dc8b6116deb6ee07731797ccd3054ae2734d110b4088020d772ad5e96fdfd1",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.LO",
    "submitted_at": "2013-02-13T03:27:29Z",
    "title_canon_sha256": "fd2f20ccc798a7a1edd7cbd8b2533834feac61ceafbf073a6064c1d11117d548"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1302.2975",
    "kind": "arxiv",
    "version": 3
  }
}