Pith Number

pith:HVTKQNS7

pith:2014:HVTKQNS7BBZVUIEFBCSCG5BPNK

not attested not anchored not stored refs pending

Alternating Projection, Ptychographic Imaging and Phase Synchronization

Hau-Tieng Wu, Stefano Marchesini, Yu-Chao Tu

arxiv:1402.0550 v3 · 2014-02-03 · math.OC · physics.optics · stat.ME

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{HVTKQNS7BBZVUIEFBCSCG5BPNK}

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	2026-05-17T23:44:00.330666Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

3d66a8365f08735a208508a423742f6a8e28c7070d8541c4519a3857300e1d75

Aliases

arxiv: 1402.0550 · arxiv_version: 1402.0550v3 · doi: 10.48550/arxiv.1402.0550 · pith_short_12: HVTKQNS7BBZV · pith_short_16: HVTKQNS7BBZVUIEF · pith_short_8: HVTKQNS7

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/HVTKQNS7BBZVUIEFBCSCG5BPNK \
  | 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: 3d66a8365f08735a208508a423742f6a8e28c7070d8541c4519a3857300e1d75

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "dcf051fe402a8f6fc617c14ac7358f593f91dcf2254863ec57583fbee86d7253",
    "cross_cats_sorted": [
      "physics.optics",
      "stat.ME"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.OC",
    "submitted_at": "2014-02-03T23:54:58Z",
    "title_canon_sha256": "0a3a4f7cd7a4c1a8fa39bf5cd3830cce54c445569acd30c2a8a0da3488a74a99"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1402.0550",
    "kind": "arxiv",
    "version": 3
  }
}