Pith Number

pith:5IXS2Q5D

pith:2013:5IXS2Q5DYWAWFRZ2L6GOYVBNUT

not attested not anchored not stored refs pending

Localization, metabelian groups, and the isomorphism problem

Gilbert Baumslag, Kent Orr, Roman Mikhailov

arxiv:1301.5533 v2 · 2013-01-23 · math.GR · math.GT

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{5IXS2Q5DYWAWFRZ2L6GOYVBNUT}

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	2026-05-18T02:49:03.386940Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ea2f2d43a3c58162c73a5f8cec542da4fe8aa67399fdb864388151f518a0890e

Aliases

arxiv: 1301.5533 · arxiv_version: 1301.5533v2 · doi: 10.48550/arxiv.1301.5533 · pith_short_12: 5IXS2Q5DYWAW · pith_short_16: 5IXS2Q5DYWAWFRZ2 · pith_short_8: 5IXS2Q5D

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/5IXS2Q5DYWAWFRZ2L6GOYVBNUT \
  | 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: ea2f2d43a3c58162c73a5f8cec542da4fe8aa67399fdb864388151f518a0890e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "844b3ff0d308ed9e8af73924db26144b06e1b0f43c5fdd456ddd361408fe7052",
    "cross_cats_sorted": [
      "math.GT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.GR",
    "submitted_at": "2013-01-23T15:24:25Z",
    "title_canon_sha256": "24a341a7be53e0be7126d3f11770fc550d423fc39d26a37e9fec145577bcde20"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1301.5533",
    "kind": "arxiv",
    "version": 2
  }
}