Pith Number

pith:E5K2ATUK

pith:2016:E5K2ATUKPUPMJ77PXXMHUYRK4D

not attested not anchored not stored refs pending

Photometric Redshift Estimation for Quasars by Integration of KNN and SVM

Bo Han, Hongpeng Ding, Yanxia Zhang, Yongheng Zhao

arxiv:1601.01739 v1 · 2016-01-08 · astro-ph.IM

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{E5K2ATUKPUPMJ77PXXMHUYRK4D}

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	2026-05-18T01:13:56.537574Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2755a04e8a7d1ec4ffefbdd87a622ae0e63b8ce26eb808d34b5f9d46aa3f6382

Aliases

arxiv: 1601.01739 · arxiv_version: 1601.01739v1 · doi: 10.48550/arxiv.1601.01739 · pith_short_12: E5K2ATUKPUPM · pith_short_16: E5K2ATUKPUPMJ77P · pith_short_8: E5K2ATUK

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/E5K2ATUKPUPMJ77PXXMHUYRK4D \
  | 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: 2755a04e8a7d1ec4ffefbdd87a622ae0e63b8ce26eb808d34b5f9d46aa3f6382

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "fa27875e58a0e8384aaf37fbe36011efebc259f0d69324023d4c2ae2dec14033",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.IM",
    "submitted_at": "2016-01-08T01:20:11Z",
    "title_canon_sha256": "4d21b10e0b8e765809a3145ab82cf73562aa882001d9287c47b7567a1c09944c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1601.01739",
    "kind": "arxiv",
    "version": 1
  }
}