Pith Number

pith:2DUBEE7O

pith:2015:2DUBEE7OJYDYC5TSQEZ6F4BMTX

not attested not anchored not stored refs pending

A High-contrast Imaging Algorithm: Optimized Image Rotation and Subtraction

Deqing Ren, Gang Zhao, Jiangpei Dou, Rui Chen, Xi Zhang, Yongtian Zhu

arxiv:1501.03893 v2 · 2015-01-16 · astro-ph.IM · astro-ph.EP

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{2DUBEE7OJYDYC5TSQEZ6F4BMTX}

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	2026-05-18T01:41:10.632050Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d0e81213ee4e078176728133e2f02c9dc7c53e6f92598eabc4f072aa996e4be5

Aliases

arxiv: 1501.03893 · arxiv_version: 1501.03893v2 · doi: 10.48550/arxiv.1501.03893 · pith_short_12: 2DUBEE7OJYDY · pith_short_16: 2DUBEE7OJYDYC5TS · pith_short_8: 2DUBEE7O

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/2DUBEE7OJYDYC5TSQEZ6F4BMTX \
  | 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: d0e81213ee4e078176728133e2f02c9dc7c53e6f92598eabc4f072aa996e4be5

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "35b65989bdc408dc41bf5fe914c6cfce289ead21a4ae50d12a4d5b4f77a68731",
    "cross_cats_sorted": [
      "astro-ph.EP"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.IM",
    "submitted_at": "2015-01-16T07:07:15Z",
    "title_canon_sha256": "1410aaec55d9f5f3b84f30c00d2c322b58d862448fc46225a4b92ca9cfd5dd7e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1501.03893",
    "kind": "arxiv",
    "version": 2
  }
}