Class SuperstarGeometry

Object

AbstractGeometry

SuperstarGeometry

public class SuperstarGeometry
extends AbstractGeometry

Directed super-star geometry with configurable petals and amplification. A super-star consists of a central hub surrounded by p petals, each with a reservoir of size r feeding into a linear chain of length k that connects back to the hub. The structure implements a strong directed evolutionary amplifier.

See Also:

• Lieberman, Hauert & Nowak (2005) Nature 433:312-316

Field Summary

Fields

Modifier and Type	Field	Description
private int	amplification	Amplification factor (length of the linear chain plus additional nodes).
private int	petals	Number of petals in the superstar structure.

Fields inherited from class AbstractGeometry

connectivity, EMPTY_LINKS, engine, features, in, isInterspecies, isRegular, isRewired, isSingle, isUndirected, isValid, kin, kout, logger, name, network2D, network3D, out, pAddwire, pRewire, size, specs, type

Constructor Summary

Constructors

Constructor	Description
SuperstarGeometry(EvoLudo engine)	Create a super-star geometry tied to the given engine.

Method Summary

Modifier and Type	Method	Description
protected boolean	checkSettings()	Hook for subclasses to implement geometry specific checks.
SuperstarGeometry	clone()	Clone geometry.
boolean	equals(Object obj)
int	hashCode()
void	init()	Generates a superstar geometry, i.e.
boolean	parse(String arg)	Parse geometry-specific CLI options.

Methods inherited from class AbstractGeometry

addDirected, addEdgeAt, addLinkAt, addUndirected, alloc, check, clearLinksFrom, clearLinksTo, create, create, decodeGeometry, deriveCompetitionGeometry, displaySingle, encodeGeometry, enforceSize, getAddwire, getConnectivity, getEncodeKey, getFeatures, getLabel, getName, getNetwork2D, getNetwork3D, getRewire, getSize, getSpecs, getType, isConsistent, isGraphConnected, isInterspecies, isLattice, isNeighborOf, isRegular, isRewired, isSingle, isType, isUndirected, isUnique, parse, removeEdgeAt, removeLinkAt, rewire, rewireDirected, rewireEdgeAt, rewireLinkAt, rewireUndirected, setAddwire, setConnectivity, setInterspecies, setName, setNetwork2D, setNetwork3D, setRewire, setSingle, setSize, setType, swapEdges, usage, warn

Methods inherited from class Object

finalize, getClass, notify, notifyAll, toString, wait, wait, wait

Field Details

petals

private int petals

Number of petals in the superstar structure.

amplification

private int amplification

Amplification factor (length of the linear chain plus additional nodes).

Constructor Details

SuperstarGeometry

public SuperstarGeometry(EvoLudo engine)

Create a super-star geometry tied to the given engine.

Parameters:

engine - EvoLudo pacemaker

Method Details

parse

public boolean parse(String arg)

Description copied from class: AbstractGeometry

Parse geometry-specific CLI options.

Overrides:

parse in class AbstractGeometry

Parameters:

arg - the argument string without the geometry key

Returns:

true if parsing succeeded, false if invalid

init

public void init()

Generates a superstar geometry, i.e. a strong directed amplifier of selection. Reservoir nodes within each petal connect to the hub via a linear chain while the hub connects back to all reservoir nodes.

Requirements/notes:

1. Population size \(N=(r+k-1)p+1\) with \(r,k,p\) integer.
2. Strong amplification requires \(r\gg k,p\).
3. Node 0 is the hub.

Specified by:

init in class AbstractGeometry

See Also:

• Lieberman, Hauert & Nowak (2005) Nature 433:312-316

checkSettings

protected boolean checkSettings()

Description copied from class: AbstractGeometry

Hook for subclasses to implement geometry specific checks.

Overrides:

checkSettings in class AbstractGeometry

Returns:

true if adjustments require a reset

clone

public SuperstarGeometry clone()

Description copied from class: AbstractGeometry

Clone geometry.

Requirements/notes:

1. Overrides clone() in Object but conflicts with GWT's aversion to clone()ing...
2. Remove @SuppressWarnings("all") to ensure that no other issues crept in when modifying method.

Overrides:

clone in class AbstractGeometry

Returns:

clone of geometry

hashCode

public int hashCode()

Overrides:

hashCode in class AbstractGeometry

equals

public boolean equals(Object obj)

Overrides:

equals in class AbstractGeometry