Pith Number

pith:OSNMM7FB

pith:2015:OSNMM7FBE7M5PXVI2ZXBFAIAD3

not attested not anchored not stored refs pending

On the Riemann-Hurwitz formula for graph coverings

A. D. Mednykh

arxiv:1505.00321 v1 · 2015-05-02 · math.AT · math.CO · math.CV

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{OSNMM7FBE7M5PXVI2ZXBFAIAD3}

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	2026-05-18T02:17:10.455220Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

749ac67ca127d9d7dea8d66e1281001ee11c1c66ae66f691aab50473ab5a2f65

Aliases

arxiv: 1505.00321 · arxiv_version: 1505.00321v1 · doi: 10.48550/arxiv.1505.00321 · pith_short_12: OSNMM7FBE7M5 · pith_short_16: OSNMM7FBE7M5PXVI · pith_short_8: OSNMM7FB

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/OSNMM7FBE7M5PXVI2ZXBFAIAD3 \
  | 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: 749ac67ca127d9d7dea8d66e1281001ee11c1c66ae66f691aab50473ab5a2f65

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c414ac1422617611d64b5d9e8a3dba7061251d4287142d09028c7744f23845ff",
    "cross_cats_sorted": [
      "math.CO",
      "math.CV"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AT",
    "submitted_at": "2015-05-02T08:07:57Z",
    "title_canon_sha256": "db6eb04b627b9191d6e6471f135cc7c91ee3c07abdd70c1769266e8bf41d75d5"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1505.00321",
    "kind": "arxiv",
    "version": 1
  }
}