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Ai është një <a href="/w/index.php?title=Funksionali_(matematik%C3%AB)&action=edit&redlink=1" class="new" title="Funksionali (matematikë) (nuk është shkruar akoma)"> funksional</a> i cili merr <a href="/wiki/Trajektorja" title="Trajektorja">trajektoren</a> (e i quajtur gjithashtu <i>rruga</i> apo <i>historia</i>) e sistemit, si argumentin e tij dhe jep një numer real si rezultat . Veprimi ka njësi <i><a href="/wiki/Energjia" title="Energjia">energjisë</a></i> × <i><a href="/wiki/Koha" title="Koha">kohë</a></i> (xhaul-sekonda në njësitë <a href="/wiki/SI" class="mw-redirect" title="SI">SI</a>), e njëjtë si <a href="/w/index.php?title=Konstantja_e_Plankut&action=edit&redlink=1" class="new" title="Konstantja e Plankut (nuk është shkruar akoma)">konstantja e Plankut</a> ose <a href="/wiki/Impulsi_k%C3%ABndor" title="Impulsi këndor">impulsi këndor</a>. Në përgjithësi, veprimi merr vlera të ndryshme për trajektore të ndryshme. Mekanika klasike postulon se rruga e ndjekur nga nje sistem real fizik është ajo per të cilat veprim minimizohet (ose, më saktë, është <a href="/w/index.php?title=Pika_stacionare&action=edit&redlink=1" class="new" title="Pika stacionare (nuk është shkruar akoma)"> e qendrueshme </a>). Ekuacionet klasike (diferenciale) te <a href="/wiki/L%C3%ABvizja" title="Lëvizja">levizjes</a> te një sistemi mund të rrjedhin nga ky parim i veprimit minimal. Formulimet stacionare te veprimit të mekanikës klasike shtrihet lehtësisht në <a href="/wiki/Mekanika_kuantike" title="Mekanika kuantike">mekanikën kuantike</a> në formulimin e <a href="/w/index.php?title=Integralit_te_shtegjeve_te_Fajmanit&action=edit&redlink=1" class="new" title="Integralit te shtegjeve te Fajmanit (nuk është shkruar akoma)">integralit te shtegjeve te Fajmanit</a>, ku një sistem fizik në të njëjtën kohë ndjek të gjitha trajektoret e mundshme me amplituda te përcaktuara nga veprimi. Ai gjithashtu siguron një bazë për zhvillimin e <a href="/wiki/Teoria_e_fijeve" class="mw-redirect" title="Teoria e fijeve">teorise se fijeve</a>. </p><p>Në qoftë se veprimi është përfaqësuar si i <a href="/wiki/Integrali" title="Integrali">integruar ne kohe</a>, i marre pergjate trajektores se sistemit në mes të kohës fillestare dhe kohën se fundit të zhvillimit të sistemit, </p> <dl><dd><span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle {\mathcal {S}}=\int L\,\mathrm {d} t\,,}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mrow class="MJX-TeXAtom-ORD"> <mrow class="MJX-TeXAtom-ORD"> <mi class="MJX-tex-caligraphic" mathvariant="script">S</mi> </mrow> </mrow> <mo>=</mo> <mo>∫</mo> <mi>L</mi> <mspace width="thinmathspace" /> <mrow class="MJX-TeXAtom-ORD"> <mi mathvariant="normal">d</mi> </mrow> <mi>t</mi> <mspace width="thinmathspace" /> <mo>,</mo> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle {\mathcal {S}}=\int L\,\mathrm {d} t\,,}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/92382b9fc18dd0a021ec06197c8250b27862df8c" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -2.338ex; width:12.308ex; height:5.676ex;" alt="{\displaystyle {\mathcal {S}}=\int L\,\mathrm {d} t\,,}"></span></dd></dl> <p>integranti , <span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle L\,}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mi>L</mi> <mspace width="thinmathspace" /> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle L\,}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/d330bc0cd693cc87e3943137dc591038a89f77e2" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.338ex; width:1.97ex; height:2.176ex;" alt="{\displaystyle L\,}"></span>, quhet <a href="/wiki/Funksioni_i_Lagranzhit" class="mw-redirect" title="Funksioni i Lagranzhit">Lagranzhiani</a> i sistemit. Ne menyre qe integrali i veprimit te jete i percaktuar trajektorja e sistemit duhet të jete e kufizuar në kohë dhe hapësirë. </p></div><noscript><img src="https://login.wikimedia.org/wiki/Special:CentralAutoLogin/start?type=1x1&useformat=desktop" alt="" width="1" height="1" style="border: none; position: absolute;"></noscript> <div class="printfooter" data-nosnippet="">Marrë nga "<a dir="ltr" href="https://sq.wikipedia.org/w/index.php?title=Veprimi_(fizikë)&oldid=795997">https://sq.wikipedia.org/w/index.php?title=Veprimi_(fizikë)&oldid=795997</a>"</div></div> <div id="catlinks" class="catlinks" data-mw="interface"><div id="mw-normal-catlinks" class="mw-normal-catlinks"><a href="/wiki/Speciale:Kategorit%C3%AB" title="Speciale:Kategoritë">Kategoritë</a>: <ul><li><a href="/wiki/Kategoria:Fizik%C3%AB" title="Kategoria:Fizikë">Fizikë</a></li><li><a href="/wiki/Kategoria:Mekanik%C3%AB" title="Kategoria:Mekanikë">Mekanikë</a></li><li><a href="/wiki/Kategoria:Mekanika_e_Lagranzhit" title="Kategoria:Mekanika e Lagranzhit">Mekanika e Lagranzhit</a></li></ul></div></div> </div> </main> </div> <div class="mw-footer-container"> <footer id="footer" class="mw-footer" > <ul id="footer-info"> <li id="footer-info-lastmod"> Kjo faqe është redaktuar për herë te fundit më 29 korrik 2010, në orën 15:04.</li> <li id="footer-info-copyright">Të gjitha materialet që gjenden në këtë faqë janë të mbrojtura nga <a rel="nofollow" class="external text" href="//creativecommons.org/licenses/by-sa/4.0/">Creative Commons Attribution/Share-Alike License</a>;. 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