Pith Number

pith:5YDPWDLJ

pith:2017:5YDPWDLJDD4LBNWHTFM55BTHOO

not attested not anchored not stored refs pending

The boundary of the Milnor fiber of the singularity f(x,y) + zg(x,y) = 0

Baldur Sigur{\dh}sson

arxiv:1702.03752 v2 · 2017-02-13 · math.AG · math.AT

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{5YDPWDLJDD4LBNWHTFM55BTHOO}

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	2026-05-18T00:30:55.248852Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ee06fb0d6918f8b0b6c79959de866773bf904ec1c21996b8a7067c8fbac14ccf

Aliases

arxiv: 1702.03752 · arxiv_version: 1702.03752v2 · doi: 10.48550/arxiv.1702.03752 · pith_short_12: 5YDPWDLJDD4L · pith_short_16: 5YDPWDLJDD4LBNWH · pith_short_8: 5YDPWDLJ

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/5YDPWDLJDD4LBNWHTFM55BTHOO \
  | 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: ee06fb0d6918f8b0b6c79959de866773bf904ec1c21996b8a7067c8fbac14ccf

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "08fb5375bc59087b4dc071cc3157a69c21a2af5ccd1009074525ade290831579",
    "cross_cats_sorted": [
      "math.AT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2017-02-13T12:51:29Z",
    "title_canon_sha256": "9669b145f8e0aa9a48fe00fdae587c834907b9545a63728a9eff28e57fd86511"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1702.03752",
    "kind": "arxiv",
    "version": 2
  }
}