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/*
* Copyright (c) 2019-2022 Frank Fischer <frank-fischer@shadow-soft.de>
* Copyright (c) 2019-2023 Frank Fischer <frank-fischer@shadow-soft.de>
*
* This program is free software: you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but
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/// If no lower bounds are specified, $-\infty$ is assumed.
///
/// The lower bounds must be less then or equal the upper bounds.
fn lower_bounds(&self) -> Option<Vec<Real>> {
None
}
/**
* Return the upper bounds on the variables.
*
* If no lower bounds are specified, $+\infty$ is assumed.
*
* The upper bounds must be greater than or equal the upper bounds.
*/
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