Pith Number

pith:V6Y5SKW5

pith:2019:V6Y5SKW5VIBNLJ7RPRWQ67U7B3

not attested not anchored not stored refs pending

Testing the Evolutionary Link between Type 1 and Type 2 Quasars with Measurements of the Interstellar Medium

Jinyi Shangguan, Luis C. Ho

arxiv:1902.02377 v1 · 2019-02-06 · 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{V6Y5SKW5VIBNLJ7RPRWQ67U7B3}

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	2026-05-17T23:50:55.766499Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

afb1d92addaa02d5a7f17c6d0f7e9f0ec7882d8231a5793fed92bb4d71b075a7

Aliases

arxiv: 1902.02377 · arxiv_version: 1902.02377v1 · doi: 10.48550/arxiv.1902.02377 · pith_short_12: V6Y5SKW5VIBN · pith_short_16: V6Y5SKW5VIBNLJ7R · pith_short_8: V6Y5SKW5

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/V6Y5SKW5VIBNLJ7RPRWQ67U7B3 \
  | 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: afb1d92addaa02d5a7f17c6d0f7e9f0ec7882d8231a5793fed92bb4d71b075a7

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "555b6b9332d776b59b6d1b198cda1406dac5773ad2d91d5adc6a1f5f238d576e",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2019-02-06T19:46:33Z",
    "title_canon_sha256": "f4d05e7da1af6064c1a8af6d757a2020735020901046d7a7583500dba8ff6c55"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1902.02377",
    "kind": "arxiv",
    "version": 1
  }
}