Pith Number

pith:CD6PKDYC

pith:2019:CD6PKDYCG7XHABV5OBZWSTUQZZ

not attested not anchored not stored refs pending

Main trends of the quasar main sequence -- effect of viewing angle

Bo\.zena Czerny, Paola Marziani, Swayamtrupta Panda

arxiv:1908.07972 v1 · 2019-08-21 · astro-ph.HE · astro-ph.GA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{CD6PKDYCG7XHABV5OBZWSTUQZZ}

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	2026-07-05T00:36:32.110220Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

10fcf50f0237ee7006bd7073694e90ce7e6e1a651029488213c94ea47b940908

Aliases

arxiv: 1908.07972 · arxiv_version: 1908.07972v1 · doi: 10.48550/arxiv.1908.07972 · pith_short_12: CD6PKDYCG7XH · pith_short_16: CD6PKDYCG7XHABV5 · pith_short_8: CD6PKDYC

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/CD6PKDYCG7XHABV5OBZWSTUQZZ \
  | 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: 10fcf50f0237ee7006bd7073694e90ce7e6e1a651029488213c94ea47b940908

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "04c5a9670a3c38b15d272da691fe5ec12a730ae35747f178cc2f8971f16b3af9",
    "cross_cats_sorted": [
      "astro-ph.GA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2019-08-21T16:22:21Z",
    "title_canon_sha256": "9c6bbc833c0acfc9909d54e37a1dc7664147a073dc4b2b7a4d98fb705235c1f9"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1908.07972",
    "kind": "arxiv",
    "version": 1
  }
}