Pith Number

pith:IUW5LNO3

pith:2019:IUW5LNO3VDQ5WSBXWWYCNRVADG

not attested not anchored not stored refs pending

\'{E}tale Homotopy Obstructions of Arithmetic Spheres

Edo Arad, Shachar Carmeli, Tomer M. Schlank

arxiv:1902.03404 v1 · 2019-02-09 · 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{IUW5LNO3VDQ5WSBXWWYCNRVADG}

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	2026-05-17T23:54:20.956888Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

452dd5b5dba8e1db4837b5b026c6a01983bc0855540680edc36f71b309b9d7ce

Aliases

arxiv: 1902.03404 · arxiv_version: 1902.03404v1 · doi: 10.48550/arxiv.1902.03404 · pith_short_12: IUW5LNO3VDQ5 · pith_short_16: IUW5LNO3VDQ5WSBX · pith_short_8: IUW5LNO3

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/IUW5LNO3VDQ5WSBXWWYCNRVADG \
  | 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: 452dd5b5dba8e1db4837b5b026c6a01983bc0855540680edc36f71b309b9d7ce

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e79997fcaf04a2cfa45100f3de8a91a09be2b456f46a60e896e905f5676c239a",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2019-02-09T10:48:55Z",
    "title_canon_sha256": "cc967f13c0affb151da8c1fd994243a35f90d145a40de05c12eb6bea0bb3487c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1902.03404",
    "kind": "arxiv",
    "version": 1
  }
}