Pith Number

pith:HGGELME4

pith:2019:HGGELME4B75OJTGGORQ2B5SM5L

not attested not anchored not stored refs pending

Cosmetic surgeries and the Poincare homology sphere

Tye Lidman

arxiv:1902.06801 v1 · 2019-02-18 · 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{HGGELME4B75OJTGGORQ2B5SM5L}

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	2026-05-17T23:53:40.767849Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

398c45b09c0ffae4ccc67461a0f64ceaf51c478050c99776446fe9abe2f61b0c

Aliases

arxiv: 1902.06801 · arxiv_version: 1902.06801v1 · doi: 10.48550/arxiv.1902.06801 · pith_short_12: HGGELME4B75O · pith_short_16: HGGELME4B75OJTGG · pith_short_8: HGGELME4

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/HGGELME4B75OJTGGORQ2B5SM5L \
  | 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: 398c45b09c0ffae4ccc67461a0f64ceaf51c478050c99776446fe9abe2f61b0c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b7433161c101b5ae4d1098593da2d7c680653a1bd63d52bc3b09aad1d6477e3f",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.GT",
    "submitted_at": "2019-02-18T21:00:08Z",
    "title_canon_sha256": "81feb8a039ee858c48f2c3b04de183113aa29d28fe7b83594672ba7c4a5a1bdc"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1902.06801",
    "kind": "arxiv",
    "version": 1
  }
}