Pith Number

pith:GL6M6Y2T

pith:2009:GL6M6Y2TQMWAYCH2FS2VLF2VGF

not attested not anchored not stored refs pending

A fixed point theorem for branched covering maps of the plane

A. Blokh, L. Oversteegen

arxiv:0904.2944 v1 · 2009-04-20 · math.GN

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{GL6M6Y2TQMWAYCH2FS2VLF2VGF}

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	2026-05-18T01:22:10.763329Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

32fccf6353832c0c08fa2cb5559755316ad821b412918836e4484a894d59e028

Aliases

arxiv: 0904.2944 · arxiv_version: 0904.2944v1 · doi: 10.48550/arxiv.0904.2944 · pith_short_12: GL6M6Y2TQMWA · pith_short_16: GL6M6Y2TQMWAYCH2 · pith_short_8: GL6M6Y2T

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/GL6M6Y2TQMWAYCH2FS2VLF2VGF \
  | 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: 32fccf6353832c0c08fa2cb5559755316ad821b412918836e4484a894d59e028

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9921589787b6cdad1cf34187ab1aa785587a3e3450f0c252cc63e1144eba994a",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.GN",
    "submitted_at": "2009-04-20T04:32:55Z",
    "title_canon_sha256": "396d9048e9ee028caf83ef33ec6c0c282f9dc8811c21ca6117e26051b4a0508f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0904.2944",
    "kind": "arxiv",
    "version": 1
  }
}