Pith Number

pith:NIEFBWMA

pith:2021:NIEFBWMAKAJXMBYBUQCMTI3AEP

not attested not anchored not stored refs pending

A multi-frequency sampling method for the inverse source problems with sparse measurements

Shixu Meng, XiaoDong Liu

arxiv:2109.01434 v1 · 2021-09-03 · math.NA · cs.NA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{NIEFBWMAKAJXMBYBUQCMTI3AEP}

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	2026-07-05T03:11:18.472359Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6a0850d9805013760701a404c9a36023d228252721fa6feddc256377b47abb23

Aliases

arxiv: 2109.01434 · arxiv_version: 2109.01434v1 · doi: 10.48550/arxiv.2109.01434 · pith_short_12: NIEFBWMAKAJX · pith_short_16: NIEFBWMAKAJXMBYB · pith_short_8: NIEFBWMA

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/NIEFBWMAKAJXMBYBUQCMTI3AEP \
  | 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: 6a0850d9805013760701a404c9a36023d228252721fa6feddc256377b47abb23

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1af09390cb0ecef66a81c50c131cdabafb195044d96ae0ca19b65edd1a4ee5af",
    "cross_cats_sorted": [
      "cs.NA"
    ],
    "license": "http://creativecommons.org/licenses/by-nc-nd/4.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2021-09-03T10:52:19Z",
    "title_canon_sha256": "3594cdf16bd83480fbf2674d1f96362357e532566ca87182a97369e5b14e55f9"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2109.01434",
    "kind": "arxiv",
    "version": 1
  }
}