Pith Number

pith:V4PU5HZ2

pith:2026:V4PU5HZ2QL6S3XWY2BDCJTNN6W

not attested not anchored not stored refs pending

ffortissimo: A Freeform Forward-Modeling Pipeline for High-Contrast Images of Circumstellar Disks Based on Automatic Differentiation

Alex Hedglen, Alycia J. Weinberger, Avalon Gower, Eden McEwen, Jared R. Males, Jay K. Kueny, Jhen Lumbres, Jialin Li, Joseph D. Long, Joshua Liberman, Katie Twitchell, Laird M. Close, Lauren Schatz, Logan Pearce, Maggie Y. Kautz, Olivier Guyon, Parker T. Johnson, Sebastiaan Haffert, Warren Foster

arxiv:2606.23478 v1 · 2026-06-22 · astro-ph.IM · astro-ph.SR

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{V4PU5HZ2QL6S3XWY2BDCJTNN6W}

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	2026-06-23T03:14:21.016936Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

af1f4e9f3a82fd2dded8d04624cdadf585c1eeab104673ecb78f13a7966f51d1

Aliases

arxiv: 2606.23478 · arxiv_version: 2606.23478v1 · doi: 10.48550/arxiv.2606.23478 · pith_short_12: V4PU5HZ2QL6S · pith_short_16: V4PU5HZ2QL6S3XWY · pith_short_8: V4PU5HZ2

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/V4PU5HZ2QL6S3XWY2BDCJTNN6W \
  | 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: af1f4e9f3a82fd2dded8d04624cdadf585c1eeab104673ecb78f13a7966f51d1

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "133c54d0f28871e2b88a2cb1bd3ec2de50414660528b043114702499f4092d34",
    "cross_cats_sorted": [
      "astro-ph.SR"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "astro-ph.IM",
    "submitted_at": "2026-06-22T15:25:22Z",
    "title_canon_sha256": "7909809ea076a09b06dabd46bcf71886add929129472aec133bfbdf9ec8c9029"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2606.23478",
    "kind": "arxiv",
    "version": 1
  }
}