Pith Number

pith:7LHPUMEV

pith:2026:7LHPUMEVZ46NDVAWOPRX634P2G

not attested not anchored not stored refs pending

Multimodal Optical Feature Extraction with a Free-Space Photonic Extreme Learning Machine

Abhinav Choube, Anshuman Kumar, Anushka Kumari, Anushree Khisti, Devansh Satra, Srivatsa Murali

arxiv:2605.29043 v1 · 2026-05-27 · 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{7LHPUMEVZ46NDVAWOPRX634P2G}

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	2026-05-29T01:04:44.309182Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

facefa3095cf3cd1d41673e37f6f8fd1b9eb4a1b8a54dba02d56198373fa748b

Aliases

arxiv: 2605.29043 · arxiv_version: 2605.29043v1 · doi: 10.48550/arxiv.2605.29043 · pith_short_12: 7LHPUMEVZ46N · pith_short_16: 7LHPUMEVZ46NDVAW · pith_short_8: 7LHPUMEV

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/7LHPUMEVZ46NDVAWOPRX634P2G \
  | 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: facefa3095cf3cd1d41673e37f6f8fd1b9eb4a1b8a54dba02d56198373fa748b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "18c220b0f0ad9aaa05a0f6781d13dd77952d006f534d785fba07a97601b2aa92",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.optics",
    "submitted_at": "2026-05-27T19:48:49Z",
    "title_canon_sha256": "e348740bc7b015f2696f6766c6d072438a1430c700e348dd146a4603b516660b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2605.29043",
    "kind": "arxiv",
    "version": 1
  }
}