Pith Number

pith:VDZRAOPE

pith:2018:VDZRAOPEH4VORC244RLT5CZSV6

not attested not anchored not stored refs pending

Algorithmic aspects of branched coverings III/V. Erasing maps, orbispaces, and the Birman exact sequence

Dzmitry Dudko, Laurent Bartholdi

arxiv:1802.03045 v2 · 2018-02-08 · math.GR · 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{VDZRAOPEH4VORC244RLT5CZSV6}

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	2026-05-18T00:23:44.717252Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a8f31039e43f2ae88b5ce4573e8b32af9aff3963eadff3e41b1644697bc6271e

Aliases

arxiv: 1802.03045 · arxiv_version: 1802.03045v2 · doi: 10.48550/arxiv.1802.03045 · pith_short_12: VDZRAOPEH4VO · pith_short_16: VDZRAOPEH4VORC24 · pith_short_8: VDZRAOPE

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/VDZRAOPEH4VORC244RLT5CZSV6 \
  | 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: a8f31039e43f2ae88b5ce4573e8b32af9aff3963eadff3e41b1644697bc6271e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "49f4b434bcc108727892dfc1d86ecb54a606814cc2c7aab2962da41fd9d2697f",
    "cross_cats_sorted": [
      "math.DS"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.GR",
    "submitted_at": "2018-02-08T20:54:43Z",
    "title_canon_sha256": "7020c059a416957e3c970f9ed351805b1dc0d5360143a48d4fbc595c84f1f1f6"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1802.03045",
    "kind": "arxiv",
    "version": 2
  }
}