Error while installing Post postgresql-9.3-postgis-2.1_2.1.4+dfsg-1.pgdg12.4+2_amd64.deb - Mailing list pgsql-pkg-debian

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Subject Error while installing Post postgresql-9.3-postgis-2.1_2.1.4+dfsg-1.pgdg12.4+2_amd64.deb
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Msg-id CADbHDy7HJPCx-KK5Z9jzH=1LakYSVufxDk+7S8-BB10vDS3NCQ@mail.gmail.com
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Responses Re: Error while installing Post postgresql-9.3-postgis-2.1_2.1.4+dfsg-1.pgdg12.4+2_amd64.deb  (Christoph Berg <cb@df7cb.de>)
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i am new to ubuntu and want to install postgis 2.1 but getting the follwing error :
postgresql-9.3-postgis2.1 depends on liblwgeom-2.1.4(>= 2.1.2);

i am using ubuntu 13.10

for more refrence i attached a scren shot also please help
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