Pith Number

pith:HZWLHUJG

pith:2020:HZWLHUJG7SPBKTQ6KM35IDGMAC

not attested not anchored not stored refs pending

Focal ratio degradation for fiber positioner operation in astronomical spectrographs

Antonio Cesar de Oliveira, Brent Belland, Dan Reiley, Evan Kirby, James Gunn, Judith Cohen, Ligia Souza de Oliveira, Michael Seiffert, Mitsuko Roberts

arxiv:2006.10902 v1 · 2020-06-19 · astro-ph.IM

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{HZWLHUJG7SPBKTQ6KM35IDGMAC}

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	2026-07-05T01:11:26.628328Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

3e6cb3d126fc9e154e1e5337d40ccc0086234d5ccb7354b9e5f55a0ee4bd3e2a

Aliases

arxiv: 2006.10902 · arxiv_version: 2006.10902v1 · doi: 10.48550/arxiv.2006.10902 · pith_short_12: HZWLHUJG7SPB · pith_short_16: HZWLHUJG7SPBKTQ6 · pith_short_8: HZWLHUJG

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/HZWLHUJG7SPBKTQ6KM35IDGMAC \
  | 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: 3e6cb3d126fc9e154e1e5337d40ccc0086234d5ccb7354b9e5f55a0ee4bd3e2a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ac692f762766882544154392a45bb36c422ad94875ef6583c30c5defdf4db682",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "astro-ph.IM",
    "submitted_at": "2020-06-19T00:05:10Z",
    "title_canon_sha256": "55749ff065c206092b3bfd8c35fea0e6f45f998cbd7cfdd26bb35776b8e23d6f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2006.10902",
    "kind": "arxiv",
    "version": 1
  }
}