Pith Number

pith:P7ZO25LX

pith:2026:P7ZO25LXKRKZ3XXERS7L52JB6N

not attested not anchored not stored refs pending

Cosmic evolution of the helium and oxygen abundances in type 2 Active Galactic Nuclei: Helium-loud AGNs

A. Feltre, A. Marconi, G. C. Almeida, G. Cresci, G. F. H\"agele, I. N. Morais, L. N. Marinho, M. Armah, M. V. Cardaci, O. L. Dors, P. C. Santos, R. A. Riffel, R. L. Sanders, R. Maiolino, R. Riffel, X. Ji, Y. Isobe

arxiv:2606.25890 v1 · 2026-06-24 · 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{P7ZO25LXKRKZ3XXERS7L52JB6N}

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	2026-06-25T01:18:42.442167Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7ff2ed757754559ddee48cbebee921f372e13c098843f51c4e2dea1125a59c17

Aliases

arxiv: 2606.25890 · arxiv_version: 2606.25890v1 · doi: 10.48550/arxiv.2606.25890 · pith_short_12: P7ZO25LXKRKZ · pith_short_16: P7ZO25LXKRKZ3XXE · pith_short_8: P7ZO25LX

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/P7ZO25LXKRKZ3XXERS7L52JB6N \
  | 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: 7ff2ed757754559ddee48cbebee921f372e13c098843f51c4e2dea1125a59c17

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "95cfe5e47535f59c2036cf496644938f7a99d0d310be70cef44515c5d4acbb6b",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2026-06-24T14:37:04Z",
    "title_canon_sha256": "988eb3be1ebb2c57a25890d756843f8b9cf954f98df1e19085bbe8403ed7962a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2606.25890",
    "kind": "arxiv",
    "version": 1
  }
}