Pith Number

pith:BN2O77RF

pith:2016:BN2O77RFXJ25EM6XXSD2IKJGUQ

not attested not anchored not stored refs pending

Segmentation-free x-ray energy spectrum estimation for computed tomography

Qiude Zhang, Tianye Niu, Wei Zhao

arxiv:1604.04986 v1 · 2016-04-18 · physics.med-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{BN2O77RFXJ25EM6XXSD2IKJGUQ}

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	2026-05-18T01:16:56.134517Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0b74effe25ba75d233d7bc87a42926a42ce7fe465d93438fba473a0905f3606d

Aliases

arxiv: 1604.04986 · arxiv_version: 1604.04986v1 · doi: 10.48550/arxiv.1604.04986 · pith_short_12: BN2O77RFXJ25 · pith_short_16: BN2O77RFXJ25EM6X · pith_short_8: BN2O77RF

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/BN2O77RFXJ25EM6XXSD2IKJGUQ \
  | 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: 0b74effe25ba75d233d7bc87a42926a42ce7fe465d93438fba473a0905f3606d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "6ce770d79f8caeaf0cefac870246d993f4a543ad07d3eac63e70b5620a28830c",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.med-ph",
    "submitted_at": "2016-04-18T05:06:09Z",
    "title_canon_sha256": "e01f0d7dd48f401386b58b9eba43448565044a5293fa8127c7aa6be142566ea5"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1604.04986",
    "kind": "arxiv",
    "version": 1
  }
}