Pith Number

pith:7LSHQ6JC

pith:2013:7LSHQ6JCL3KGL2WELDVRTSIBZO

not attested not anchored not stored refs pending

Thompson's group F is not SCY

Stefan Friedl, Stefano Vidussi

arxiv:1312.3421 v1 · 2013-12-12 · math.GT · math.GR · math.SG

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{7LSHQ6JCL3KGL2WELDVRTSIBZO}

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	2026-05-18T01:16:07.568636Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

fae47879225ed465eac458eb19c901cbb74ae2e3603f053cef328d20e8860767

Aliases

arxiv: 1312.3421 · arxiv_version: 1312.3421v1 · doi: 10.48550/arxiv.1312.3421 · pith_short_12: 7LSHQ6JCL3KG · pith_short_16: 7LSHQ6JCL3KGL2WE · pith_short_8: 7LSHQ6JC

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/7LSHQ6JCL3KGL2WELDVRTSIBZO \
  | 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: fae47879225ed465eac458eb19c901cbb74ae2e3603f053cef328d20e8860767

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ba9a88279fbeb90dd3f5fe3cd1a8c203881cee4624ba3ecc9f09a08bafdfb73b",
    "cross_cats_sorted": [
      "math.GR",
      "math.SG"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.GT",
    "submitted_at": "2013-12-12T09:09:59Z",
    "title_canon_sha256": "c4ebf5cc6efa479bf695b7f865756b8a4d7b4676f34460e6fe6960918c3b5798"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1312.3421",
    "kind": "arxiv",
    "version": 1
  }
}