Pith Number

pith:KXRKUDA2

pith:2013:KXRKUDA2HY7PCPEXAJZ65X3XKW

not attested not anchored not stored refs pending

Fitting the Continuum Component of A Composite SDSS Quasar Spectrum Using CMA-ES

Daniel E. Vanden Berk, Jian Wu

arxiv:1312.7356 v1 · 2013-12-27 · 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{KXRKUDA2HY7PCPEXAJZ65X3XKW}

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	2026-05-18T03:03:43.690984Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

55e2aa0c1a3e3ef13c970273eedf7755b7f2b2d1fce922b24e56490f325e6301

Aliases

arxiv: 1312.7356 · arxiv_version: 1312.7356v1 · doi: 10.48550/arxiv.1312.7356 · pith_short_12: KXRKUDA2HY7P · pith_short_16: KXRKUDA2HY7PCPEX · pith_short_8: KXRKUDA2

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/KXRKUDA2HY7PCPEXAJZ65X3XKW \
  | 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: 55e2aa0c1a3e3ef13c970273eedf7755b7f2b2d1fce922b24e56490f325e6301

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "3a7c69f99a6f752a0f57f39f7a2676aaef13a967bfaf76478558d1494545f23b",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by-nc-sa/3.0/",
    "primary_cat": "astro-ph.IM",
    "submitted_at": "2013-12-27T21:14:04Z",
    "title_canon_sha256": "5e7d689ef56bf0187a3407d2679bf33e5cc91507370ae89f0ccc3c916cb7b6f3"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1312.7356",
    "kind": "arxiv",
    "version": 1
  }
}