<?xml version="1.0" encoding="ISO-8859-1"?><article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<front>
<journal-meta>
<journal-id>0035-001X</journal-id>
<journal-title><![CDATA[Revista mexicana de física]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. mex. fis.]]></abbrev-journal-title>
<issn>0035-001X</issn>
<publisher>
<publisher-name><![CDATA[Sociedad Mexicana de Física]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0035-001X2021000500004</article-id>
<article-id pub-id-type="doi">10.31349/revmexfis.67.050704</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Optical solitons to a perturbed Gerdjikov-Ivanov equation using two different techniques]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Shehata]]></surname>
<given-names><![CDATA[M. S. M.]]></given-names>
</name>
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</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rezazadeh]]></surname>
<given-names><![CDATA[H.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Jawad]]></surname>
<given-names><![CDATA[A. J. M.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Zahran]]></surname>
<given-names><![CDATA[E. H. M.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
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<surname><![CDATA[Bekir]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Zagazig University Faculty of Science Departments of Mathematics]]></institution>
<addr-line><![CDATA[Zagazig ]]></addr-line>
<country>Egypt</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Amol University of Special Modern Technologies Faculty of Engineering Technology ]]></institution>
<addr-line><![CDATA[Amol ]]></addr-line>
<country>Iran</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Al Rafidain University Faculty of Science Departments of Mathematics]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Iraq</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Benha University Faculty of Engineering Departments of Mathematical and Physical Engineering]]></institution>
<addr-line><![CDATA[Shubra ]]></addr-line>
<country>Egypt</country>
</aff>
<aff id="Af5">
<institution><![CDATA[,Neighbourhood of Akcaglan  ]]></institution>
<addr-line><![CDATA[Eskisehir ]]></addr-line>
<country>Turkey</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>10</month>
<year>2021</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>10</month>
<year>2021</year>
</pub-date>
<volume>67</volume>
<numero>5</numero>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0035-001X2021000500004&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0035-001X2021000500004&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0035-001X2021000500004&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract In this article, the perturbed Gerdjikov-Ivanov equation, describing the dynamics of propagation of solitons, is studied. The balanced modified extended tanh-function and the non-balanced Riccati-Bernoulli Sub-ODE methods are used for the first time to obtain the new optical solitons of this equation. The obtained results give an accurate interpretation of the propagation of solitons. We performed a comparison between our results and those in the literature. The efficiency of these methods for constructing the exact solutions has been demonstrated. It is shown that these different techniques reduce the large number of calculations.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[The Perturbed Gerdjikov-Ivanov (GI)-equation]]></kwd>
<kwd lng="en"><![CDATA[the METF method]]></kwd>
<kwd lng="en"><![CDATA[the RBSub-ODE method]]></kwd>
<kwd lng="en"><![CDATA[Optical solitons]]></kwd>
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