Pith Number

pith:IW2NUM3E

pith:2020:IW2NUM3E4AWQAIFXZUZ2PKJIM3

not attested not anchored not stored refs pending

Reply to the comment of T. Metcalfe and J. van Saders on the Science report "The Sun is less active than other solar-like stars"

A. I. Shapiro, B. T. Montet, E. M. Amazo-G\'omez, N. A. Krivova, R. H. Cameron, S. K. Solanki, T. Reinhold

arxiv:2007.04817 v1 · 2020-07-09 · astro-ph.SR · astro-ph.EP

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{IW2NUM3E4AWQAIFXZUZ2PKJIM3}

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	2026-07-05T01:17:34.222123Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

45b4da3364e02d0020b7cd33a7a92866d24b77115719c86302f473e21e518be2

Aliases

arxiv: 2007.04817 · arxiv_version: 2007.04817v1 · doi: 10.48550/arxiv.2007.04817 · pith_short_12: IW2NUM3E4AWQ · pith_short_16: IW2NUM3E4AWQAIFX · pith_short_8: IW2NUM3E

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/IW2NUM3E4AWQAIFXZUZ2PKJIM3 \
  | 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: 45b4da3364e02d0020b7cd33a7a92866d24b77115719c86302f473e21e518be2

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8cef667fa7685d28b365b4981b7d60be1392276c85677a3eebc5f45e8c90f2a3",
    "cross_cats_sorted": [
      "astro-ph.EP"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2020-07-09T14:05:59Z",
    "title_canon_sha256": "42a8defe324aa7161ba365cdf3a7796e28d99fcb16b4f20f5e6055cfdbc3dd78"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2007.04817",
    "kind": "arxiv",
    "version": 1
  }
}