Pith Number

pith:HGBXNBDI

pith:2018:HGBXNBDISLNLIRCUMMRBMPA5AI

not attested not anchored not stored refs pending

Removing a ray from a noncompact symplectic manifold

Xiudi Tang

arxiv:1812.00444 v2 · 2018-12-02 · math.SG · math.DG · math.DS

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{HGBXNBDISLNLIRCUMMRBMPA5AI}

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	2026-05-17T23:51:43.677972Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

398376846892dab444546322163c1d02137a198c7b461167b373a722f684e6e1

Aliases

arxiv: 1812.00444 · arxiv_version: 1812.00444v2 · doi: 10.48550/arxiv.1812.00444 · pith_short_12: HGBXNBDISLNL · pith_short_16: HGBXNBDISLNLIRCU · pith_short_8: HGBXNBDI

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/HGBXNBDISLNLIRCUMMRBMPA5AI \
  | 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: 398376846892dab444546322163c1d02137a198c7b461167b373a722f684e6e1

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c4eaad76dd3de1737fed1a5fb3de50a1c7aa7101d22b3a7b79d3751e9c2b671e",
    "cross_cats_sorted": [
      "math.DG",
      "math.DS"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.SG",
    "submitted_at": "2018-12-02T18:51:35Z",
    "title_canon_sha256": "fbea522c77b3dc2eb53d73c5d02c917a59bc4ee6a33adcfb57fe029630e7b8b6"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1812.00444",
    "kind": "arxiv",
    "version": 2
  }
}