Pith Number

pith:MEHIHXWU

pith:2015:MEHIHXWU7TWFIR5FFMX7QIUPRM

not attested not anchored not stored refs pending

A note on reversibility and Pell equations

Alexandre Rodrigues, Maria Carvalho, Mario Bessa

arxiv:1511.08649 v1 · 2015-11-27 · math.DS

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{MEHIHXWU7TWFIR5FFMX7QIUPRM}

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	2026-05-18T01:25:48.401849Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

610e83ded4fcec5447a52b2ff8228f8b07cd536d2fb7d3bb3a2749804f5269c2

Aliases

arxiv: 1511.08649 · arxiv_version: 1511.08649v1 · doi: 10.48550/arxiv.1511.08649 · pith_short_12: MEHIHXWU7TWF · pith_short_16: MEHIHXWU7TWFIR5F · pith_short_8: MEHIHXWU

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/MEHIHXWU7TWFIR5FFMX7QIUPRM \
  | 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: 610e83ded4fcec5447a52b2ff8228f8b07cd536d2fb7d3bb3a2749804f5269c2

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b140f9b34ab088e2be6c95cdf270aa661f1c77878e07588d11e5aee85dfc3b0e",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.DS",
    "submitted_at": "2015-11-27T12:46:47Z",
    "title_canon_sha256": "2afa805113e87d1c9dc695b4da80655e066c700803457f09fc393a64d3438be0"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1511.08649",
    "kind": "arxiv",
    "version": 1
  }
}