Pith Number

pith:CWAGGYUT

pith:2010:CWAGGYUTDE2IR5AJ2IDKWUAVWW

not attested not anchored not stored refs pending

On the non-existence of certain branched covers

Juan Souto, Pekka Pankka

arxiv:1008.1694 v1 · 2010-08-10 · math.GT · math.AT · 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{CWAGGYUTDE2IR5AJ2IDKWUAVWW}

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	2026-05-18T04:42:23.467736Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

1580636293193488f409d206ab5015b5982582138e347eb4593111c1de267781

Aliases

arxiv: 1008.1694 · arxiv_version: 1008.1694v1 · doi: 10.48550/arxiv.1008.1694 · pith_short_12: CWAGGYUTDE2I · pith_short_16: CWAGGYUTDE2IR5AJ · pith_short_8: CWAGGYUT

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/CWAGGYUTDE2IR5AJ2IDKWUAVWW \
  | 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: 1580636293193488f409d206ab5015b5982582138e347eb4593111c1de267781

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "3b7fd286b7fbbc28517b8953f3d887f13f100c486198fc2b21de38e3b7597d9a",
    "cross_cats_sorted": [
      "math.AT",
      "math.CV"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.GT",
    "submitted_at": "2010-08-10T11:33:03Z",
    "title_canon_sha256": "ecdbfa06ea67f6172f6b16c6ebda36db7469200682e4b62a8e5781c0f186accf"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1008.1694",
    "kind": "arxiv",
    "version": 1
  }
}