Pith Number

pith:R4QN5DWZ

pith:2026:R4QN5DWZJCCMP6RMWXVQ6DZAMY

not attested not anchored not stored refs pending

VAR-PZnn: A machine-learning framework for AGN photometric redshifts using color and variability-based features

A. B. Kova\v{c}evi\'c, A. I. Malz, A. Peca, A. Rojas-Lilay\'u, A. Viitanen, A. W. Graham, B. Rani, B. Sotomayor, C. G. Bornancini, C. Mazzucchelli, C. Ricci, D. De Cicco, D. Ili\'c, D. Marsango, D. P. Schneider, E. Saremi, F. E. Bauer, F. Zou, G. T. Richards, H. Guo, I. Yoon, J. Fagin, L. Hernandez-Garc\'ia, M. Espinoza-Ortiz, M. Fatovi\'c, M. J. Temple, M. Marculewicz, M. Salvato, P. Ar\'Evalo, P. Lira, P. S\'anchez-S\'aez, R. A. Riffel, R. J. Assef, R. Shirley, S. Panda, S. Satheesh-Sheeba, T. Anguita, T. Mkrtchyan, T T. Ananna, V. Petrecca, W.N. Brandt, Z. Yu

arxiv:2607.16434 v1 · 2026-07-17 · 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{R4QN5DWZJCCMP6RMWXVQ6DZAMY}

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	2026-07-21T00:20:18.442629Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8f20de8ed94884c7fa2cb5eb0f0f20661490508cdab619eec1b63d20f058ffe0

Aliases

arxiv: 2607.16434 · arxiv_version: 2607.16434v1 · doi: 10.48550/arxiv.2607.16434 · pith_short_12: R4QN5DWZJCCM · pith_short_16: R4QN5DWZJCCMP6RM · pith_short_8: R4QN5DWZ

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/R4QN5DWZJCCMP6RMWXVQ6DZAMY \
  | 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: 8f20de8ed94884c7fa2cb5eb0f0f20661490508cdab619eec1b63d20f058ffe0

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "209fc94d7b3888f0838a142b8bd3f04a1ee04fb64830d0308d6e5c59698b6370",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2026-07-17T18:29:57Z",
    "title_canon_sha256": "1613b5dfbe7aee7ec46dfb747d023fb770a71d558c91d8b6b5fb45f8a1530677"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2607.16434",
    "kind": "arxiv",
    "version": 1
  }
}