Pith Number

pith:NSAJIAIT

pith:2016:NSAJIAITVZMJ7STP4MMD3AFHVK

not attested not anchored not stored refs pending

On Relationship of Koopman Eigenvalues and Frequencies in Dynamic Mode Decomposition

Aleksey Alekseev

arxiv:1603.06508 v1 · 2016-03-21 · physics.flu-dyn

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{NSAJIAITVZMJ7STP4MMD3AFHVK}

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	2026-05-18T01:18:48.379262Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6c80940113ae589fca6fe3183d80a7aabfa5aa6ba30e2992b470574d9a443a16

Aliases

arxiv: 1603.06508 · arxiv_version: 1603.06508v1 · doi: 10.48550/arxiv.1603.06508 · pith_short_12: NSAJIAITVZMJ · pith_short_16: NSAJIAITVZMJ7STP · pith_short_8: NSAJIAIT

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/NSAJIAITVZMJ7STP4MMD3AFHVK \
  | 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: 6c80940113ae589fca6fe3183d80a7aabfa5aa6ba30e2992b470574d9a443a16

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "6d3b9c9f160083ffcd490de674fc4c1589d2ef56881caf3f967d5f03955c41ad",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.flu-dyn",
    "submitted_at": "2016-03-21T17:33:07Z",
    "title_canon_sha256": "ccf52be7992348ff2c99204338031d244ad919430e05db084938901af819ecf3"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1603.06508",
    "kind": "arxiv",
    "version": 1
  }
}