 blooming flowers and lush green vegetation, visitors are up for a treat in the spring. Likewise, sunny days and clear skies await tourists visiting Nepal during autumn.
There is another reason why autumn is undoubtedly the best time to travel to Nepal. The major festivals of Nepal; Dashain and Tihar are celebrated in this season. You will most likely find yourself blending in the ambiance of these Festivals of Victory and Light.
While it’s quite possible to visit Nepal during the summer, it isn’t highly recommended. It is very hot and the lower regions can get dusty. Moreover, there are heavy chances of rain which will make the path muddy and wet. So, if you are planning to travel in this season, make sure to pack accordingly.
If you are planning to book a tour package of Nepal in the winter, it won’t be a problem as long as you pack warm clothes.
Zambuling Trekking is a small group of experienced specialists giving top quality extravagant holidays, short treks, family vacation, and day tours in Nepal. We offer an exclusive and broad scope of escorted luxury tours, trip packages, private guides, cultural tours, biking tours, hiking, and helicopter tours, all at incredible costs.
You can expect to discover amazing places with fascinating stories as our guides will help you with essential information and directions. We can assure you of a memorable trip as you enjoy the best time of your lives.
Enjoy a great tour experience with a great company! Explore all of our Nepal Tour Packages and contact us to tailor them according to your requirements.
Chisapani Day Hiking is one of the popular, short and easy treks around the Kathmandu valley. The trek is also known as Rim valley trek. Chisapani Day Hiking trek starts from Kathmandu to Sundarijal by a drive and then trek to Chisapani. It lies in the north of Kathmandu city. This trek is popular for spectacular views of the snow-capped mountain and beautiful Nepali village with green t...
Everest Base Camp Helicopter Tour is one of the best designed and popular activities that Team Zambuling Trekking offers to its clients for experience the taste of snowfield mountain land with close views with their open eyes. Mt. Everest is the top of the world or say highest point on the earth which enhances the beauty of our richest country in terms of biodiversity, fosters the pride of it...
Paragliding in Nepal is one of the recreational and competitive adventure sports. During Paragliding, you will be flying freely with the glider aircraft high above the sky which makes you feel no less than the bird. Paragliding in Nepal is perfect in the month of November and December. Pokhara valley is the most popular destination for paragliding in Nepal. Paragliding is available...
Option ‘A’Peace Pagoda Biking Day TourThe day bike tour begins from your hotel in Lakeside Pokhara; ride along with jeep track to uphill via Pumdi Bhumdi and get 360° of a magnificent glimpse of massive Annapurna and the beautiful Pokhara city with blue Fewa Lake. After some refreshment descends to following jeep trail and single track via strolling around David fall, Gupteshwar Cave and Internati...
We begin our day by sightseeing around most of the key part of the city like Pashupatinath, supreme Hindu temple for Hindu, Boudhanath Stupa which is world biggest stupa, Monkey temple of Swyambhunath, Patan and Bhaktapur Durbar Square where we get to unlock the very traditional age of Nepal, art, architecture, textiles, carvings, stone statue, multi roofed temples, wonderful monasteries costumes...
Lumbini and Pokhara Tour Drive to Sarangkot – 6500ft Pokhara close-up view of mountains of Annapurna range including Machhapuchhre 6977m, Annapurna South 7195m, Annapurna I 7647m, Machhapuchure 6997m, Annapurna III 7555m, Annapurna II 7937m, Annapurna IV 7525m, Gangapurna, Lamjung Himal and from the viewpoint of Sarangkot we can even see Dhaulagiri, Manaslu, Tent peak or Tharpu Chulli. Boating in...
Kathmandu, Chitwan and Gorakhpur Tour itinerary is designed to focus for family, couples, friends, groups or individuals who want to spend their holiday in Nepal for a short period of time and want to enjoy their holiday. The tour itinerary cover Kathmandu valley world heritage site, Hindu Manakamana Temple, Pokhara, Chitwan, and Lumbini. In this tour package, the visitor can enjoy with...
Loop Groups, Higgs Fields and Generalised String Classes

We consider various generalisations of the string class of a loop group bundle. The string class is the obstruction to lifting a bundle whose structure group is the loop group $LG$ to one whose structure group is the Kac-Moody central extension of the loop group. We develop a notion of higher string classes for bundles whose structure group is the group of based loops, $\Omega G$. In particular, we give a formula for characteristic classes in odd dimensions for such bundles which are associated to characteristic classes for $G$-bundles in the same way that the string class is related to the first Pontrjagyn class of a certain $G$-bundle associated to the loop group bundle in question. This provides us with a theory of characteristic classes for $\Omega G$-bundles analogous to Chern-Weil theory in finite dimensions. This also gives us a geometric interpretation of the well-known transgression map $H^{2k}(BG) \to H^{2k-1}(G).$ We also consider the obstruction to lifting a bundle whose structure group is not the loop group but the semi-direct product of the loop group with the circle, $LG \rtimes S^1$. We review the theory of bundle gerbes and their application to central extensions and lifting problems and use these methods to obtain an explicit expression for the de Rham representative of the obstruction to lifting such a bundle. We also relate this to a generalisation of the so-called `caloron correspondence' (which relates $LG$-bundles over $M$ to $G$-bundles over $M \times S^1$) to a correspondence which relates $LG \rtimes S^1$-bundles over $M$ to $G$-bundles over $S^1$-bundles over $M$.


Signed Statement
This work contains no material which has been accepted for the award of any other degree or diploma in any university or other tertiary institution and, to the best of my knowledge and belief, contains no material previously published or written by another person, except where due reference has been made in the text.

Introduction
String structures first appeared in Killingback's paper [22] as a string theory version of the well-known spin structures that are important in quantum field theory. The results came out of a study of global anomalies in the worldsheet of a string and the idea was motivated by an observation of Witten [45] that the Dirac-Ramond operator in string theory can be considered as Dirac-type operator on the loop space.
Recall that if one is given a principal SO(n)-bundle (for example the frame bundle of a manifold), a spin structure is given by a lifting of the structure group of this bundle to its simply connected double cover Spin(n). Killingback's idea then, is to replace the bundles which appear in the definition of a spin structure with an infinite-dimensional bundle whose structure group is the loop group of Spin(n) and consider a lifting of this bundle. More generally, if G is a compact Lie group and LG is its loop group, we could consider lifting any LG-bundle P → M to a bundle whose structure group is the central extension of LG. It turns out that the obstruction s(P ) to the existence of such a lift is an element of the degree three cohomology of the base, H 3 (M, Z). Killingback proved that, in the case where the LG-bundle P is in fact given by taking loops in a principal G-bundle Q → X, this obstruction class is the transgression of the first Pontrjagyn class of Q. That is, where ev : S 1 × LX → X is the evaluation map. The class s(P ) ∈ H 3 (LX, Z) is called the string class of P. The link with spin structures and Witten's observation regarding the Dirac-Ramond operator is given by noticing that in quantum field theory the Dirac operator can only be defined if spacetime is spin and correspondingly in string theory the Dirac-Ramond operator can only be defined if spacetime is string (i.e. has a string structure).
The present work grew out of an attempt to answer some questions naturally arising from some papers concerning string structures and loop group bundles. In [35] Murray and Stevenson use techniques from the theory of bundle gerbes to give an explicit formula for a representative in de Rham cohomology of the string class of a general LG-bundle and provide a link with previous work on monopoles. The theory of gerbes was first introduced by Giraud [17] and studied extensively in Brylinski's book [4]. Gerbes provide a geometric realisation for degree three cohomology in an analogous way to the way in which line bundles (or U (1)bundles) provide a geometric realisation of degree two