Pith Number

pith:G7QLIO7H

pith:2023:G7QLIO7HMDTELLAY2FT3G4ON6Q

not attested not anchored not stored refs pending

Calculating Point Spread Functions: Methods, Pitfalls and Solutions

Colin J.R. Sheppard, Erich Rohwer, Gurthwin Bosman, Martin Kielhorn, Ratsimandresy Holinirina Dina Miora, R. Heintzmann

arxiv:2301.13515 v2 · 2023-01-31 · physics.optics

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{G7QLIO7HMDTELLAY2FT3G4ON6Q}

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	2026-07-05T07:53:59.355527Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

37e0b43be760e645ac18d167b371cdf42bd2a506f9b6cdaac28bb93efdcff36e

Aliases

arxiv: 2301.13515 · arxiv_version: 2301.13515v2 · doi: 10.48550/arxiv.2301.13515 · pith_short_12: G7QLIO7HMDTE · pith_short_16: G7QLIO7HMDTELLAY · pith_short_8: G7QLIO7H

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/G7QLIO7HMDTELLAY2FT3G4ON6Q \
  | 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: 37e0b43be760e645ac18d167b371cdf42bd2a506f9b6cdaac28bb93efdcff36e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4a6589a42978435f6a2db6625b1675fa45e4bc40249cacdf085d34ef66a3bc7f",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by-nc-nd/4.0/",
    "primary_cat": "physics.optics",
    "submitted_at": "2023-01-31T10:06:08Z",
    "title_canon_sha256": "444817b70a4fbc9f59e550d20ab42d00fb1f9a16a90460fbff2210c50bea25f2"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2301.13515",
    "kind": "arxiv",
    "version": 2
  }
}