Pith Number

pith:IKPT7JL3

pith:2014:IKPT7JL3FWYJ5EN6UVXXVA2FC6

not attested not anchored not stored refs pending

On the (non) superstable part of the free group

Chlo\'e Perin, Rizos Sklinos

arxiv:1411.6253 v1 · 2014-11-23 · 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{IKPT7JL3FWYJ5EN6UVXXVA2FC6}

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	2026-05-18T02:33:00.418196Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

429f3fa57b2db09e91bea56f7a834517a4239a0150f1b7fc2b03991a1b69d992

Aliases

arxiv: 1411.6253 · arxiv_version: 1411.6253v1 · doi: 10.48550/arxiv.1411.6253 · pith_short_12: IKPT7JL3FWYJ · pith_short_16: IKPT7JL3FWYJ5EN6 · pith_short_8: IKPT7JL3

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/IKPT7JL3FWYJ5EN6UVXXVA2FC6 \
  | 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: 429f3fa57b2db09e91bea56f7a834517a4239a0150f1b7fc2b03991a1b69d992

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "fcb6995c050b44ef6745869427a123a155292035f0618ada31869fa6a993683f",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.LO",
    "submitted_at": "2014-11-23T15:48:47Z",
    "title_canon_sha256": "6e956e9beaa4b176c9712a7d0cc0faaa3393f7951d3c188a48887def244d7470"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1411.6253",
    "kind": "arxiv",
    "version": 1
  }
}