Pith Number

pith:DFCY7C6Z

pith:2016:DFCY7C6ZMU4OIJZ6MWLD4FJPQA

not attested not anchored not stored refs pending

A Characterization of regular points by $L^2$ Extension Theorem

Qi'an Guan, Zhenqian Li

arxiv:1603.02887 v1 · 2016-03-09 · math.CV

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{DFCY7C6ZMU4OIJZ6MWLD4FJPQA}

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	2026-05-18T01:19:19.645752Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

19458f8bd96538e4273e65963e152f802d5083660ea0cee5c56fbfb5b998f3c0

Aliases

arxiv: 1603.02887 · arxiv_version: 1603.02887v1 · doi: 10.48550/arxiv.1603.02887 · pith_short_12: DFCY7C6ZMU4O · pith_short_16: DFCY7C6ZMU4OIJZ6 · pith_short_8: DFCY7C6Z

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/DFCY7C6ZMU4OIJZ6MWLD4FJPQA \
  | 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: 19458f8bd96538e4273e65963e152f802d5083660ea0cee5c56fbfb5b998f3c0

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "03254c98e78291edfe40ae631a0891875b84a1b6eb280f670cb9f7d1440e349f",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CV",
    "submitted_at": "2016-03-09T13:58:29Z",
    "title_canon_sha256": "74e57c8ab12724681a407f85bc129b3aaeefa084fad2eb5d8ff51ef368b3daa5"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1603.02887",
    "kind": "arxiv",
    "version": 1
  }
}