Pith Number

pith:SVBY5PVL

pith:2018:SVBY5PVLWKBTDXMU72ZMGSZBO7

not attested not anchored not stored refs pending

Algebraic tangent cones of reflexive sheaves

Song Sun, Xuemiao Chen

arxiv:1808.02172 v1 · 2018-08-07 · math.DG · math.AG

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{SVBY5PVLWKBTDXMU72ZMGSZBO7}

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	2026-07-05T04:02:11.976722Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

95438ebeabb28331dd94feb2c34b2177f9bf0437c4fb6261bfaa62e8d649c4de

Aliases

arxiv: 1808.02172 · arxiv_version: 1808.02172v1 · doi: 10.48550/arxiv.1808.02172 · pith_short_12: SVBY5PVLWKBT · pith_short_16: SVBY5PVLWKBTDXMU · pith_short_8: SVBY5PVL

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/SVBY5PVLWKBTDXMU72ZMGSZBO7 \
  | 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: 95438ebeabb28331dd94feb2c34b2177f9bf0437c4fb6261bfaa62e8d649c4de

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "78db0488495268260a88f80728fdf1e6cd5ce8dfbd70092e008cf3b7f97bedeb",
    "cross_cats_sorted": [
      "math.AG"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.DG",
    "submitted_at": "2018-08-07T01:05:04Z",
    "title_canon_sha256": "b067cf9247e1a731945b093ff7157047c60aafcf89cfac348790c6a160a6a6d7"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1808.02172",
    "kind": "arxiv",
    "version": 1
  }
}