Pith Number

pith:R2FUB7TV

pith:2019:R2FUB7TV4RZEN64L5DP7SD4X2B

not attested not anchored not stored refs pending

A note on the curve complex of the 3-holed projective plane

B{\l}a\.zej Szepietowski

arxiv:1907.09042 v1 · 2019-07-21 · math.GT

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{R2FUB7TV4RZEN64L5DP7SD4X2B}

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	2026-05-17T23:40:02.315034Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8e8b40fe75e47246fb8be8dff90f97d05eb65086747416ab0a584bc65b62fe07

Aliases

arxiv: 1907.09042 · arxiv_version: 1907.09042v1 · doi: 10.48550/arxiv.1907.09042 · pith_short_12: R2FUB7TV4RZE · pith_short_16: R2FUB7TV4RZEN64L · pith_short_8: R2FUB7TV

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/R2FUB7TV4RZEN64L5DP7SD4X2B \
  | 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: 8e8b40fe75e47246fb8be8dff90f97d05eb65086747416ab0a584bc65b62fe07

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1a8ae637be13a4cec06d03680fbded2fd4b8de069a613d2af36e0fd582a394bb",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.GT",
    "submitted_at": "2019-07-21T22:03:35Z",
    "title_canon_sha256": "37253c1eca971329bd668a82c6d7a80be75cc9c4620a32c9caa591682c3299f4"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1907.09042",
    "kind": "arxiv",
    "version": 1
  }
}