Pith Number

pith:GQWH72YH

pith:2021:GQWH72YHW6E6FNUWI5PCIADIVV

not attested not anchored not stored refs pending

Appearance vs Disappearance of broad absorption line troughs in quasars

Hum Chand, M. Vivek, Ravi Joshi, Sapna Mishra

arxiv:2103.08499 v1 · 2021-03-15 · 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{GQWH72YHW6E6FNUWI5PCIADIVV}

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	2026-07-05T02:29:46.495131Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

342c7feb07b789e2b696475e240068ad60b9f8ed7e566b99f3012794338266bc

Aliases

arxiv: 2103.08499 · arxiv_version: 2103.08499v1 · doi: 10.48550/arxiv.2103.08499 · pith_short_12: GQWH72YHW6E6 · pith_short_16: GQWH72YHW6E6FNUW · pith_short_8: GQWH72YH

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/GQWH72YHW6E6FNUWI5PCIADIVV \
  | 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: 342c7feb07b789e2b696475e240068ad60b9f8ed7e566b99f3012794338266bc

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "36242e15a3905bd71be617b40487e8dad9e2860b4102de39fdfd86f1e34e8a2e",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2021-03-15T16:19:08Z",
    "title_canon_sha256": "c8f11fa69c73dc4d49912b671e823b501ee6f91e2edc0729acc6cad2630a1978"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2103.08499",
    "kind": "arxiv",
    "version": 1
  }
}