Pith Number

pith:EWY7J3O7

pith:2013:EWY7J3O7JKIA3PFCT3XJTRLQFA

not attested not anchored not stored refs pending

Harder-Narasimhan filtration for rank 2 tensors and stable coverings

Alfonso Zamora

arxiv:1306.5651 v3 · 2013-06-24 · 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{EWY7J3O7JKIA3PFCT3XJTRLQFA}

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	2026-05-18T00:40:42.214421Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

25b1f4eddf4a900dbca29eee99c570283d9119a638c69ff753a3f8f575f066b0

Aliases

arxiv: 1306.5651 · arxiv_version: 1306.5651v3 · doi: 10.48550/arxiv.1306.5651 · pith_short_12: EWY7J3O7JKIA · pith_short_16: EWY7J3O7JKIA3PFC · pith_short_8: EWY7J3O7

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/EWY7J3O7JKIA3PFCT3XJTRLQFA \
  | 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: 25b1f4eddf4a900dbca29eee99c570283d9119a638c69ff753a3f8f575f066b0

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8753657532bb35af2417234fa6d703654e50bf48a14c012696c56775609e7528",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2013-06-24T15:15:31Z",
    "title_canon_sha256": "93292cce51c568a014b2d7e8193b8598f109c210f6fc8dab87227c47d3efc8a0"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1306.5651",
    "kind": "arxiv",
    "version": 3
  }
}